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 NYC EVENTS FOR JUNE 2018 
 -----------------------
 John Pazmino 
 NYSkies Astronomy Inc  
 nyskies@nyskies.org  
 www.nyskies.org 

    The following astronomy activities in the commuting ring enclosing 
New York City are operated by various organizations. A few cultural  
items of special importance to City astronomers are also included.  
    Altho NYC Events confirms the listed items, they are subject to 
change by their sponsors. Check with their contacts. Let the sponsor  
know that you learned of its event thru NYC Events.  
    Frequently asked questions and explanation of NYC Events is at 
'www.nyskies.org/nyc-faq.htm'.  
    You may ask for previous NYC Events thru 'nyskies@nyskies.org' 
because only the current issue is in the website. It is replaced by  
next month's issue.  
    For events which missed NYC Events, check the NYSkies Yahoogroup 
forum. Join NYSkies by visiting 'www.nyskies.org/yahoo.htm' and 
picking either the email or website option.  
    All hours are Eastern Dayulight Savings Time (UT - 4h) . 

General notes 
 -----------                           / 
    'whole City' means the event has no specific or dedicated place. 
It may be enjoyed from the whole NYSkies territory or at a number of 
individual places. Celestial events are typicly 'whole City' events.  
    'all day' means the event is continuous or repeating during the 
open hours of the host facility. Facilities may have limited hours per 
day or days per week. Check with the event contacts.  
    'adv regn reqd',for 'advance registration required/requested' 
means that the event requires or requests signing up before the event. 
You must have your ticket in hand at the gate. There could be a 
deadline some days before the event, after which no more signups are 
accepted. Check with the event contact for specifics. 
    Prices cited are the 'rack rate'. You could qualify for discounts 
 As may be offered by the sponsor. Besides the base price there may be 
noptional extra fees to consider. 

Current Month calendar  
 --------------------
  Plain dates are in current month;  
  -, previous month; +, next month.  
  Moon phase: .NM., .FQ), (FM), (LQ.  
  Sunset is noted for each Saturday  
  ---------------------------------
  Sun   Mon   Tue   Wed   Thu   Fri   Sat   sunset 
  ------------------------------------------------
  -27   -28  -(29)  -30   -31     1     2  20:22 
    3     4     5    (6.    7     8     9  20:26 
   10    11    12   .13.   14    15    16  20:29 
   17    18    19   .20)   21    22    23  20:31 
   24    25    26  ( 27)   28    29    30  20:31 
 ------------------------------------------------

Index  of Events  
 ------------- 
 * = NASA-JPL Night Sky Network affiliate  
 Date = entry in 'list of events' section 
 '0' = entry in 'ongoing and continuing events' section 
 'S/O',= entry in 'skipped, Sep/Oct resumption' section 
  'M/A' = entry in 'skipped, Mar/Apr resumption' secrion // '???' = 
entry in 'skipped, uncertain resumption' seciton 
 ------- -----------------------------------------------
    BROOKLYN - BK 
 *Floyd Bennett Field - - - 15 
   Parade of Trains - - - - 16-17 
  Secret Science Club - - -  0 

    CONNECTICUT - CT 
 *A S of Gtr Hartford   - - S/O 
  Astro Soc of Greenwich  - S/O 
 *Astro Soc of New Haven  - 26 
  Bowman Observatory  - - -  6, 20 
 *Litchfield Hills AAC mtg   8 
 *Litchfield Hills starvg - 15 
 *McCarthy Observatory  - -  9 
  New Pond Farm - - - - - - ??? 
  Stamford Observatory  - -  1, 8, 15, 22, 29 
 *Van Vleck Obsy (ASGH) - -  16 
  Van Vleck Obsy (WU) - - - S/O 
  Western CT St Univ Obsy - S/O 
 *Westport Astro Soc mtg  - 19 
 *Westport Astro Soc starvg  6, 13, 20, 27 
  -------------------------
  Boothe Meml Astro Soc - 203-377-9933, 
    www.facebook.com/Boothe-Memorial-Astronomical-Society 

    LONG ISLAND - LI 
 *Amateur Observers Soc - -  3 
  Amer Instt Aero & Astro - 20 
  Astro Soc of Long Island   6, 13, 20, 27 
  Brookhaven National Lab - ??? 
  Custer Institute  - - - -  2, 9, 16, 23, 30 
  Hofstra Univ Obsy - - - - S/O 
  Montauk Observatory - - - 15, 27, 29 
  SUNY Stony Brook   -  - - S/O 
 *Susan Rose Observatory  -  2, 9, 16, 23, 30 
 
    MANHATTAN - MH  
 *Amat Astro Assn starvwg -  0 
 *Amat Astro Assn lecture - S/O 
  Amer Musm Natl Hist   - -  6 
  Ctr for Atmosp Ocean Sci  S/O 
  Ctr for Science & Society ??? 
  Central Pk (Great Lawn) -  1,2,3,8,9,10,15,16,17,22,23,24,29,30 
 *Columbia Univ Obsy  - - - ??? 
  Cornelia Street Cafe' - -  3 
  Earth Institute - - - - - ??? 
  Good Housekeeping lab   -  8 
  Governor's Island - - - -  1-Oct 31 
  Gullicar's Gate - - - - -  0 
  Instt Stud Ancnt World  - S/O 
  Intrepid AstroCafe' - - - 15 
  Intrepid Astro Night  - -   8 
 *Inwood Astronomy Project    2, 9, 16, 23, 30 
  'Jews in Space' exhibit -  1-late June 
  'Jews in space' lecture   21 
  Jupiter Joe Sidewk Astro   0 
  Milky Way spring season -  1-30 
  Natl Musm of Mathematics   6 
  NY Academy of Sciences  - ??? 
  NYC-H2O - - - - - - - - -  0 
  New York Univ Astro - - - S/O 
 *NYSkies Astronomy Seminar  1, 15 
  SciCafe'  - - - - - - - -  6 
  Science & the Arts  - - - ??? 
  Simons Foundation - - - - S/O 
  Top of the Lawn - - - - -  1,2,3,8,9,10,15,16,17,22,23,24,29,30  
  TriState computer fair  -  0 
  Urban Park Rangers -  - -  0 
  Weekend Walks - - - - - -  1-mid Dec 2018 
  World Science Festival  -  1-3 
  ----------------------------
 Ctr for Space Sci Edu - - info@nyccsse.org, www.nyccsse.org,  
            212-608-6164 n 
    METRO-NORTH - NY  
  Lamont-Doherty Obsy - - - S/O 
  Mid-Hudson Astro Assn - - 15 
  Ramapo Challenger Ctr - - 17 
  Vassar College Obsy - - - S/O 
  Ward Pound Ridge  - - - -  9 
  Westchester Amat Astro  -  1 

    NEW JERSEY - NJ  
  A A A of Princeton  - - - 12 
  A S of Toms Rv Area - - - ??? 
 *Amat Astro Inc meeting  -  1, 8, 15, 22, 29 
 *Amat Astro Inc lecture  - S/O 
  Joint Base Centennial   -  0 
  Morris Musm Astro Soc - - 14 
  New Jersey Astro Assn - - 23 
  No Jersey Astro Gp mtg  - 13 
  No Jersey Astro Gp starvg S/O 
  Peyton Observarory  - - - ??? 
  Plasma Physics Lab  - - -  1, 15 
  Rutgers Univ Astro Collqm S/O 
  Rutgers Univ Astro Semnr  S/O 
 *S*T*A*R - - - - - - - - -  7 
  Schommer Observatory  - - 14, 21 
 *Sheep Hill Astro Assn - -  1 
 *Sheep Hill Observatory  - 15 
 *Utd Astro Clubs of NJ - -  2, 9, 16, 23, 30 
  Washington Xing St Pk - -  1, 8, 15, 22, 29 
  ---------------------------
  Dark Sky Observers - www.users.nac.net/gburke/club  
  McDowell Obsy - mec.rst2.edu, 201-460-8300 
  Montclair Telescope Club - 973-948-5284, bischoff@garden.net,    
        users.erols.com/njastro/orgs/mtc.hrm  
 NW Jersey Amat Astro - www.nwjaa.org, info@nwjaa.org 
  Passaic Co Astro Assn - www.users.nac.net/gburke/PCAA, 973-523-0024 
 *Raritan Vy Co Coll Plm  - www2.raritanval.edu/planetarium  
   Skyland Stargazers  -  skylandstargazers.tripod.com 

    QUEENS - QN  
  Alley Pond Park - - - - - 23 
  York College Observatory  S/O 

    REST OF WORLD 

    STATEN ISLAND - SI   
  Coll of Staten Is Obsy  - S/O 
  Great Kills Park  - - - - 16 
  Staten Is Community TV  -  1, 8, 15, 22, 29 

    THE BRONX - BX 
  
 ============================= 

Ongoing and continuing events 
  --------------------------
    all day - whole state - NJ - Joint Base centennial shows 
        VARIOUS LOCATIOONS ND TIMES; INQUITR AT CONTACT 
       Thru 2018 Oct 31. 100th annivesaty if Fort Dix and later 
        worls of McGuire AFN and Lakehurst NAS. These are only 
        military facilityies jointly run by all three major branches, 
        army, air force, navy. Events staged at or near bases. Most 
        ree, some pay. www.nj.gov/state/historical/index.html, 
        609-292-6062, Feedback@sos.nj.gov 
    all day - whole City - MH - cultural tour 
        VARIOUS LOCATIONS AND TIMES; INQUIRE AT CONTACT 
        NYC-H2O. Walk, bike, ride thru history and culture of NYC 
        muwater system facilities and natural waterways in and near 
        the City.  Events are pay orfree, adn regn reqd. Bike tours 
        need own bike. www.nych2o.org, 
        matt@nych2o.org 
    all day - whole City - MH - clearsky starviewing  
        VARIOUS PLACES, DATES, HOURS; INQUIRE AT CONTACT  
        Amat Astro Assn. Sessions convene in parks usually at dusk. 
        Occasional daytime sunviewing. Free. Cancelled for clouds. 
          president@aaa.org, 718-522-5014, www.aaa.org  
    all day - whole City - MH - clearsky starviewing  
        VARIOUS PLACES, DATES, HOURS; INQUIRE AT CONTACT  
        Jupiter Joe's Sidewalk Astronomy. Sessions convene in parks 
        usually at dusk. Occasional daytime sunviewing. Free. `       
        Cancelled for clouds.  www.jupiterjoesastronomy.org, 
        jupiyerjoesastronomy@gmail.com 
    all day - Gullivaer's Gate - MH - cultural exhibit 
        indef duration. 216 W 44 St, 7/8 Av. Opened in mid April 2017 
        for preview. Miniature models of landmarks and important 
        structures from around the world. Rooms arranged by quarter of 
        world and for New York City. $36, timed ticket, adv regn reqd. 
        Optional cost for stereopint of visitor into figurine placed 
        at desired item in exhibit. www.gulliversgate.com. 
    all day - whole City - MH - cultural tours & lectures 
        VARIOUS PLACES, DATES, HOURS; INQUIRE AT CONTACT  
        Urban Park Rangers. Tours of parks, landmarks, nabes, hoods. 
        Lectures on history and culture of NYC. Program varies each 
        month. Free. www.nyc.gov/parks  
    10:00 - whole City - MH - Tri-State Computer Fair 
        VARIOUS LOCATIONS, GENERALLY ON SUNDAYS 
        Source of computer systems, software, components, accessories. 
        $7. www.tri-statefairs.com, 718-227-5586 
    20:00 - Bell House - BK - Secret Science Club meeting  
        OCCASIONAL SESSIONS; INQUIRE AT CONTACT 
        149 7 St, 2/3 Av. Lecture and music on various science  
        topics. Free. secretscienceclub.blogspot.com, 718-638-4400, 

List of events 
 ---------                                                          
 Fri  1 Jun 
    all day - VIVO Institt - MH - 'Jews in Space' exhibit 
        Thru late June 2018. Within Ctr for Jewsih Hist buldg, 15 
       W 16 St, 5/6 Av. Opened Feb 26. Art pieces, photos, books & 
        maps, artifacts from Jewish astronauts and astronomers from 
        17th century to today. Free, have GI photo ID for campus 
        security. ww.vivo.org, 212-246-6080, vivomail@vivo.cjh.org. 
    all day - whole City - MH - World Science Festival 
        VARIOUS LOCATIONS AND HOURS; INQUIRE AT CONTACT 
        Thru Sun 3 Jun. Lectures, shows, performances, exhibits for 
        all sciences. Some events are  free, some pay. Many concurrent 
        events in different locations. www.worldsciencefestival.com, 
        info@worldsciencefestival.com 
    all day - Governors Island - MH - cultural shows 
        FERRY IS FREE FOR FIRST WEEK, MAY 1-6, THENAFTER $2 RT 
        Thru 31 Oct. Island is open on every day, 10h-20h weekdayss, 
        10h-19h weekends. Walk and tour thru former military base and 
        new urban park. Shows vary each day or visit by foot or bike. 
        Ferries run every day 10h-17h from Battery Marine Terml, MH, 
        and on weekdays from Pier 6, BK. Island is free but ferry 
         fare is $2 RT. www.nps.gov/gois, 
        www.govisland.com 
    all day - whole City - MH - Weekend Walks street fairs 
        VARIOUS LOCATIONS AND DATES; INQUIRE AT CONTACT 
       Thru mid Dec. NYC Dept of Transptn closes certain steets in 
        all boros on Saturdayss for street fairs. Stores and local 
         orgs offer ntertainment, discount sales, exhibits, food 
        service Free. 
        www.nyc.gov/html/dot/weekendwalks/html/home/home.shtml 
    00:00 - whole City - MH - spring Milky Way season 
        Thru Jun 30. Spring season for sighting Milky Way from within 
        NYC. Requires dark clear sky and thoro knowledge of normal 
        luminous graffiti in sky. Milky Way is in high east sky at 
        about 02:00. www.nyskies.org/articles/pazmino/milky-ny.htm    
    10:00 - Princeton - NJ - science tour 
        Plasma Physics Lab. Walk thru history and culture of fproject 
        to capture energy from controled hydrogen fusion. Free, adv 
        regn reqd. Photo ID required for campus security. 
        www.pppl.gov/events 
    18:30 - McBurney House - MH - NYSkies Astronomy Seminar  
        PRESENTATION: HOW WE WENT TO THE MOON A HUNDREED YEARS AGO 
        125 W 14 St, 6/7 Av. Discussion of astronomy topics, show 
        & tell, skywatching reports, news of astro activity in NYSkies 
        territory. Free. nyskies@nyskies.org, www.nyskies.org     
    19:30 - Cranford - NJ - Amat Astro Inc meeting 
        Union Co Coll, Sperry Obsy. Indoor talk, clearsky  
        starviewing. Free. www.asterism.org, hfjacinto6@gmail.com  
    19:30 - Boonton - NJ - Sheep Hill Astro Assn meeting  
        Boonton Senior Ctr. Free. www.sheephillastro.org, 
        contacts@sheephillastro.org, wwestura@optonline.net 
    19:30 - Pleasantville - NY - Westchester Amat Astro meeting  
        Pace Univ, Miller Hall, Free. www.westchesterastronomers.org, 
        waa-president@westchesterastronomers.org  
    19:30 - Staten Is Community TV - SI - science show 
        100 Cable Way, Mariners Hr SI. 'Geology forum' Live audience, 
        seating at 19:30, on air at 20:00. Free. www.sictv.org, 
        718-727-1414 
    20:00 - Stamford - CT - astronomy lecture 
        Stamford Obsy. $3. Indoor lecture, clearsky starviewing. 
        203-322-6537, www.stamfordmuseum.org, cescovil@earthlink.net 
    20;00 - Wash'n X'ing - NJ - clearsky starviewing 
        Amat Astro Assn of Princeton. Simpson Obsy. Free, cancelled 
       for clouds. www.princetonastronomy.org, 609-737-2575, 
      info@princetonastronomy.org 
    20:00 - Central Park - MH - clearsky starviewing 
        PLUS OCCASIONAL EXTRA SESSIONS; INQUIRE AT CONTACT  
        Top of the Lawn. North path of Great Lawn. Free. Cancelled for 
        clouds. tags_p@yahoo.com, www.nyskies.org, nyskies@nyskies.org 

Sat  2 Jun 
    20:00 - Southold - LI - Custer Institute meeting 
        OCCASIONAL EXTRA EVENTS; INQUIRE AT CONTACT  
        Custer Instt. Indoor program, clearsky starviewing. $5-$15. 
        Varies with program. www.custerobservatory.org, 
        president@custerobservatory.org, 631-765-2626  
    20:00 - Jenny Jump St Forest - NJ - Utd A C of NJ mtg 
        UACNJ Obsy. Indoor talk, clearsky starviewing. Free.  
        www.uacnj.org 
    20:00 - Susan Rose Obsy - LI - clearsky starviewing  
        Amat Obsrs Soc. capus of Custer Institt. Sessions concurrent 
        with Custer's own events. Free, cancelled for clouds. 
        www.aosny.org, suerose@optonline.net             
    20:00 - Inwood Hill Park - MH cleasky starviewing 
        OCCASIONAL EXTRA SESSIONS; INQUIRE AT CONTACT  
        Inwood Astronomy Project. Meet at park entrance, Seaman Av 
        & Isham St. Free. Cancelled for clouds. 917-529-2359 
        www.inwoodastronomy.org, asonskendall@gmail.com 
    20:00 - Central Park - MH - clearsky starviewing - see Jun 1 

Sun  3 Jun 
    13:15 - Uniondale - LI - Amat Obsrs Soc meeting. 
        Hofstra Univ, Berliner Hall. Free. www.aosny.org, 
        suerose@optonline.net 
    18:00 - Cornelia St Cafe' - MH - Entertaining Science show 
        29 Cornelia St & W 4 St, Play & music on various 
        science themes. $10 + one drink min. 
        www.corneliastreetcafe.com, 212-989-9319 
    20:00 - Central Park - MH - clearsky starviewing - see Jun 1 

Wed  6 Jun 
     16:00 - Natl Musm of Mathematics - MH - science show 
        Also 19:00. 'Mathematical Encounters'. Free, adv regn 
        reqd. 212-542-0566, www.momath.org, info@momath.org 
    19:00 - Amer Musm Natl Hist - MH - SciCafe' show 
        Hall of Ocean Life or hall of planet Earth. Music, drinks, 
        chat with Museum scientists. Free, be 21 or be gone. GI photo 
        ID reqd. 212-769-5100, www.amnh.org/programs 
    20:00 - Centerport - LI - Astro Soc of LI meeting 
        Vanderbilt Plm. Free. asliastronomy@yahoo.com, 
        www.asliclub.org 
    20:30 - Westport - CT - clearsky starviewing 
        Westport Astro Soc. Rolnick Obsy. Free. Cancelled for 
        clouds. www.was-ct.org, 203-227-0925 
    20:30 - Greenwich - CT - clearsky starviewing 
        Astro Soc of Greenwich. Curtis Elem Schl, Bowman Obsy. Free. 
        Cancelled for clouds. rickbria@optonline.net, 203-415-6762. , 
        astrogreenwich.org 

Thu  7 Jun 
    20:00 - Lincroft - NJ - S*T*A*R meeting 
        Brookdale Commty Coll, Mommouth Museum. Free. 
        www.starastronomy.org, s-walters@comcast.net 

Fri  8 Jun 
    10:00 - Good Housekeeping Resrch Instt - MH - science tour 
        Also 11:30. Hearst Tower, 57 St & 8 Av. Walk thru history and 
        science of product testing center of Good Housekeeping 
        magazine. Free, adv regn reqd. 212-649-5000, 
        ghritours@hearst.com 
     19:30 - Intrepid Museum - MH - astronomy lecture 
        Flight deck of ship. Indoor/open air lecture, clearsky 
        starviewing. Free. www.intrepidmuseum.org 
    19:30 - Torrington - CT - Litchfield Hills Amat Astro Club mtg 
        Central Congregational Church. Free.lhaacsec@gmail.com 
        lhastro.org 
    19:30 - Cranford - NJ - Amat Astro Inc meeting - see Jun 1 
    19:30 - Staten Is Community TV - SI - science show - see Jun 1 
    20:00 - Stamford - CT - astronomy lecture - see Jun 1 
    20;00 - Wash'n X'ing - NJ - clearsky starviewing - see Jun 1 
    20:00 - Central Park - MH - clearsky starviewing - see Jun 1 

Sat  9 Jun 
    20:00 - New Milford - CT - astronomy lecture  
        McCarthy Obsy, New Miford HS. Indoor lecture, clearsky  
        starviewing. Free. www.mccarthyobservatory.org, 860-354-1595, 
        contact@mccarthyobservatory.org 
    20:00 - Ward Pound Ridge - NY - clearsky starviewing 
        Westchester Amat Astro. Meadows Picnic Area. Free. Cancelled 
        for clouds. waa-president@westchesterastronomers.org 
        www.westchesterastronomers.org, 
    20:00 - Southold - LI - Custer Institute meeting - see Jun 2 
    20:00 - Jenny Jump St Forest - NJ - Utd A C of NJ mtg - see Jun 2 
    20:00 - Inwood Hill Park - MH cleasky starviewing - see Jun 2 
   20:00 - Susan Rose Obsy - LI - clearsky starviewing  - see Jun 2 
    20:00 - Central Park - MH - clearsky starviewing - see Jun 1 

Sun 10 Jun 
    20:00 - Central Park - MH - clearsky starviewing - see Jun 1 

Tue 12 Jun 
    19:30 - Princeton - NJ - Amat Astro Assn of Princeton meeting 
        Princeton U, Peyton Hall. Free. www.princetonastronomy.org, 
        609-737-2575, info@princetonastronomy.org 

Wed 13 Jun 
    20:00 - Upper Montclair - NJ - No Jersey Astro Gp meeting 
        Montclair St Univ, Richardson Hall, Room 232. Free. 
        njastro.org, 973-655-7266 
    20:00 - Centerport - LI - Astro Soc of LI meeting - see Jun 6 
    20:30 - Westport - CT - clearsky starviewing - see Jun 6 

Thu 14 Jun 
    19:30 - Morristown - NJ - Morris Museum Astro Soc meeting  
         Morris Museum. Free. 973-386-1848, 973-386-1848,, 
        www.mmastrosociety.org, info@morrismusem.org, 
        ckkrish@gmail.com 
    20:30 - Piscataway - NJ - clearsky starviewing 
        Rutgers Univ, Schommer Obsy. Free. Cancelled for clouds.  
        732-205-0020, www.physics.rutgers.edu/ast/ast-serin.html  
        pryor@physics.rutgers.edu 

Fri 15 Jun 
    10:00 - Princeton - NJ - science tour - see Jun 1 
    18:30 - McBurney House - MH - NYSkies Astronomy Seminar  
        DISCUSSION: OBSERVING THE MOON'S SURFACE 
        125 W 14 St, 6/7 Av. Discussion of astronomy topics, show 
        & tell, skywatching reports, news of astro activity in NYSkies 
        territory. Free. nyskies@nyskies.org, www.nyskies.org 
    19:00 - Lk Taghkanic St Pk - NY - clearsky starviewing 
        Mid-Hudson Astro Assn. West Beach parking lot. Free,  
        cancelled for clouds. Adv regn reqd with vehicle make, 
        model, plate number for park security. `       
        www.nidgudsonastronomy.org 
     19:30 - Intrepid Museum - MH - AstroCafe' lecture 
        Flight deck of ship. Indoor/open air lecture, clearsky 
        starviewing. Food & drink service, bar drinks sold only to 21+ 
        YO. Free. www.intrepidmuseum.org 
    19:30 - Cranford - NJ - Amat Astro Inc meeting - see Jun 1 
    19:30 - Staten Is Community TV - SI - science show - see Jun 1 
    20:00 - Floyd Bennett Field - BK - clearsky starviewing 
        Community Garden. NYSKies & Natl Park Svc. Free. Cancelled 
        for clouds. www.nyskies.org, stephenlieber@nyc.rr.com, 
        nyskies@nyskies.org 
    20:00 - Stamford - CT - astronomy lecture - see Jun 1 
    20;00 - Wash'n X'ing - NJ - clearsky starviewing - see Jun 1 
    20:00 - Central Park - MH - clearsky starviewing - see Jun 1 
    20:30 - Boonton - NJ - clearsky starviewing  
        Sheep Hill Astro Assn Obsy, Free. Cancelled for  
        clouds. sheephillastro.otg, contacts@sheephillastro.org, 
        wwestura@optonline.net 
    20:30 - Litchfield - CT - Litchfield Hills A A C lecture 
        White Meml Consrvn Ctr. Free. Indoor lecture, clearsky 
        starviewing. lhaac.shutterfly.com, lhaacsec@gmail.com 
        lhastro.org 
    21:30 Bridgehampton - LI - astronomy lecture 
        Montauk Obsy, South Fork Natl Hist Musm.. Indoor talk, 
        clearsky starviewing. Free. www.montaukobservatory.com 

Sat 16 Jun 
    11:00 - Brighton Beach - BK - Parade of Trains show 
        Thru Sun 17 Jun. NY Transit Museum. Brighton line, Brighton Bh 
        station. Visit and ride several antique subway trains. Get 
        ferroviana at pop-up Museum shop, rap with subway crew, take 
        pictures and films of trains. Cintinuous rides along Brighton 
        line. Free with any subway route to Brighton Bh station. 
        www.nytransitmuseum.org 
     20:00 - Middletown - CT - clearsky starviewing 
        Astro Soc of Gtr Hartford, Wesleyan U, Van Vleck Obsy. Free. 
        Cancelled for clouds. www.asgh.org, 860-872-9069,  
        pparkers@cs.com 
    20:00 - Great Kills Pk - SI - clearsky starviewing 
        Natl Pk Svc. Enter at Hylan Bv to playground; Free. Cancelled 
        for clouds. www.nps.gov/gate, 718-987-6790  n 
   20:00 - Susan Rose Obsy - LI - clearsky starviewing  - see Jun 2 
    20:00 - Inwood Hill Park - MH cleasky starviewing - see Jun 2 
    20:00 - Jenny Jump St Forest - NJ - Utd A C of NJ mtg - see Jun 2 
    20:00 - Central Park - MH - clearsky starviewing - see Jun 1 
    20:00 - Southold - LI - Custer Institute meeting - see Jun 2 

Sun 17 Jun 
    14:00 - Airmont - NY - science show 
        Ramapo Challenger Ctr, 225 Rt 29. Multimedia 
       imulation of space missions. $20. wwwlhvcc.com, 
        director@lhvcc.com, 845-257-3416. 
    20:00 - Central Park - MH - clearsky starviewing - see Jun 1 

Tue 19 Jun 
    20:00 - Westport - CT - Westport Astro Soc meeting 
         Rolnick Obsy. Free. www.was-ct.org, 203-227-0925 

Wed 20 Jun 
    18:00 - Bethpage - LI -  Amer Instt Aero & Astro lecture       
        Bethpage Public Library. Various topics in aeronautics and 
        astronautics. 'Nars sample return missiOn'. Free, optional $5 
        pizza-soda. 516-458-8593, davidparis@twc.com 
    20:00 - Centerport - LI - Astro Soc of LI meeting - see Jun 6 
    20:30 - Greenwich - CT - clearsky starviewing - see Jun 6 
    20:30 - Westport - CT - clearsky starviewing - see Jun 6 

Thu 21 Jun 
    18:30 - VIVO Institt - MH - 'Jews in Space' lecture 
        Within Ctr for Jewsih Hist buldg, 15 W 16 St, 5/6 Av. 
        Reflection and prospection honoring astronaut Ilan Ramon, who 
        died in the Columbia Shuttle disaster in 2003. $15, adv regn 
        reqd. Have GI photo ID for campus security. ww.vivo.org, 212-
        246-6080, vivomail@vivo.cjh.org. 
    20:30 - Piscataway - NJ - clearsky starviewing - see Jun 14 

Fri 22 Jun 
    19:30 - Staten Is Community TV - SI - science show - see Jun 1 
    19:30 - Cranford - NJ - Amat Astro Inc meeting - see Jun 1 
    20;00 - Wash'n X'ing - NJ - clearsky starviewing - see Jun 1 
    20:00 - Stamford - CT - astronomy lecture - see Jun 1 
    20:00 - Central Park - MH - clearsky starviewing - see Jun 1 

Sat 23 Jun 
    19:30 - Alley Pond Park - QN - astronomy lecture 
        Alley Pond Enviro Ctr. Indoor lecture, clearsky 
        starviewing. $14 at door.. www.alleypond.org, 
        info@alleypond.org, 718-229-4000 
   20:00 - Susan Rose Obsy - LI - clearsky starviewing  - see Jun 2 
    20:00 - Inwood Hill Park - MH cleasky starviewing - see Jun 2 
    20:00 - Jenny Jump St Forest - NJ - Utd A C of NJ mtg - see Jun 2 
    20:00 - Central Park - MH - clearsky starviewing - see Jun 1 
    20:00 - Southold - LI - Custer Institute meeting - see Jun 2 
    20:30 - Voorhees St Pk - NJ - NJ Astro Assn meeting 
        NJAA-HQ, Robinson Obsy. Indoor lecture, clearsky 
        starviewing. Free. www.njaa.org, 908-368-8600 

Sun 24 Jun 
    20:00 - Central Park - MH - clearsky starviewing - see Jun 1 

Tue 26 Jun 
    19:00 - New Haven - CT - Astro Soc of New Haven meeting 
        Yale Univ, Leitner Family Obsy. Indoor talk, clearsky 
        starviewing. Free. www.asnh.org, prez@asnh.org 

Wed 27 Jun 
    20:30 East hampton - LI - astronomy lecture 
        Montauk Obsy, Fuild Hall.. Indoor talk, 
        clearsky starviewing. Free. www.montaukobservatory.com 
    20:00 - Centerport - LI - Astro Soc of LI meeting - see Jun 6 
    20:30 - Westport - CT - clearsky starviewing - see Jun 6 

Fri 29 Jun 
    14:30 East hampton - LI - astronomy lecture 
        Montauk Obsy, Fuild Hall.. Indoor talk, 
        clearsky starviewing. Free. www.montaukobservatory.com 
    19:30 - Cranford - NJ - Amat Astro Inc meeting - see Jun 1 
    19:30 - Staten Is Community TV - SI - science show - see Jun 1 
    20;00 - Wash'n X'ing - NJ - clearsky starviewing - see Jun 1 
    20:00 - Stamford - CT - astronomy lecture - see Jun 1 
    20:00 - Central Park - MH - clearsky starviewing - see Jun 1 

Sat 30 Jun 
   20:00 - Susan Rose Obsy - LI - clearsky starviewing  - see Jun 2 
    20:00 - Inwood Hill Park - MH cleasky starviewing - see Jun 2 
    20:00 - Jenny Jump St Forest - NJ - Utd A C of NJ mtg - see Jun 2 
    20:00 - Southold - LI - Custer Institute meeting - see Jun 2 
    20:00 - Central Park - MH - clearsky starviewing - see Jun 1 

Events Skipped This Month 
 -----------------------                                          
 EVENT MAY RESUME AT DIFFERENT PLACE OR HOUR; INQUIRE AT CONTACT 
  --------------------------------------
  --------------------------------------
  [S/O] SEPTEMBER/OCTOBER RESUMPTION OF ACTIVITY 
  --------------------------------------
    11:00 - Palisades - NY - science lecture 
        Lamont-Doherty Earth Obsy, Comer Bldg. Various topics in 
        geophysics and earth science. Free, 845-365-8634, 
        www.ldeo.columbia.edu, suzana@ldeo.columbia.edu, 
    13:30 - Piscataway - NJ - astronomy lecture 
        Seminar series. Rutgers Univ, Serin 401. Free. 732-445-3974, 
        www.physics.rutgers.edu/ast/seminar 
    14:00 - New York University - MH - astronomy lecture 
        726 Broadway, Rm 940. Various topics in astrophys and 
        relativity. Free. Have GI photo ID for campus security. 
        physics.nyu.edu/events.htm 
    15:30 - Courant Institute - MH - science lecture 
        Ctr for Atmosp & Ocean Studies. Weaver Hall, 251 Mercer 
        St. Various topics in geophysics and earth science. Free. 
        caos.cims.nyu.edu, shafer@cims.nyu.edu 
    15:30 - Greenwich - CT - Astro Soc of Greenwich meeting 
        Greenwich Public Library. Free with musm adm. 
        rickbria@optonline.net, 203-415-6762, astrogreenwich.org 
    16:30 - Piscataway - NJ - astronomy lecture 
         Colloquium series. Rutgers Univ, Busch Campus, Astro & Phys 
        Lectr Hall. Free. www.physics.rutgers.edu/colloquium, 
        732-445-3974 
    17:00 - Simons Foundation - MH - scinece lecture 
         160 5 Av & 21 St. 'How and why Mercury is different from its 
        sibling rocky planets?'. Free, adv regn reqd. 646-654-0066, 
        ww.simonsfoundation.org 
    18:00 - Inst Stud Anc World - MH - cultural lecture 
        15 E 84 St, 5/Madison Av. Various topics on history and 
         culture of ancient civilizations.. Free, adv regn reqd. 
        isaw..nyu.edu isaw@nyu.edu, 212-992-7842 
    18:15 - Amer Musm Natl Hist - MH - Amat Astro Assn lecture 
         Kaufmann Theater. Free, no musm adm fee. 718-522-5014, 
        president@aaa.org, www.aaa.org 
   19:00 - Coll of Staten Is - SI - clearsky starviewing 
        Astrophys Obsy. Free, cancelled for clouds. 718-982-2818, 
        csivc.csi.cuny.edu/supernove7/files/home.html, 
        robbins@mail.csi.cuny.edu, 
     19:30 - Stony Brook - LI - astronomy lecture 
        SUNY Stony Brook, Earth & Spc Sci Hall. Indoor lecture, 
        clearsky starviewing. Free. www.ess.sunysb.edu/astro, 
        631-632-8100, slutterbie@notes.cc.sunysb.edu 
     19:30 - New Brittain - CT - Astro Soc of Gtr Hartford meeting 
        Central CT St Univ, Copernicus Plm. Free. www.asgh.org, 
        860-872-9069, pparkerrs@cs.com         
    20:00 - Cranford - NJ - Amat Astro Inc lecture 
        Union Co Coll, Smith Audm. Indoor talk, clearsky 
        starviewing. Free. www.asterism.org 
    20:00 - Danbury - CT - astronomy lecture 
        Westn Conn St Uv, Obsy/Plm. Indoor planetarium show, 
        clearsky starviewing. Free. www.wcsu.edu/starwatch, 
        203-837-8671, dawsond@wcsu.edu 
    20:00 - York College - QN - astronomy lecture . 
        Core Academic Bdg, Rm AC-2E01. Indoor lecture, clearsky 
        starviewing. Free, adv regn reqd. 718-262-2082, 
        www.york.cuny.edu/centers-institutes/observatory, 
       tpaglione@york.cuny.edu 
    20:00 - Uniondale - LI - clearsky starviewing 
        Hofstra University,Berliner Bdg, Rm 117. Free, 
        adv regn reqd. Cancelled for clouds. 516-463-2759, 
        www.hofstra.edu/Academics, observatory@hofstra.edu 
    20:0:0 - Columbia University - MH - astronomy lecture 
          Pupin Hall, signs to lecture room. Indoor lecture, clearsky 
         starviewing. Free. outreach-admin@astro.columbia.edu, 
         www.astro.columbia.edu/outreach, 212-854-3278 
    20:00 - Upper Montclair - NJ - clearsky starviewing 
        No Jersey Astro Gp. Montclair St Univ, Richardson Hall.        
        Free, cancelled for clouds. njastro.org, 973-655-7266,  
    20:00 - Middletown - CT - clearsky starviewing 
        Wesleyan U, Van Vleck Obsy. Free, cancelled for clouds. 
        860-685-3664, www.wesleyan.edu/astro/events 
    21:00 - Poughkeepsie - NY - clearsky starviewing 
        Vassar College, Observatory. Free. Cancelled for clouds. 
        physicsandastronomy.vassar.edu/observatory.html, 
        845-437-7340 


  --------------------------------------
  [???] UNCERTAIN RESUMPTION OF ACTIVITY 
  --------------------------------------
    18:00 -CUNY Graduate Center - MH - Ctr for Sci & Soc lecture 
        385 Fifth Av. 'Early modernb science intertwine An 
        Iberoamerican perspective'.. Free, adv regn reqd, Free,  
        limited seating. 212-854-7211, 
        scienceandsociety.columbia.edu 
    18:00 - Earth Institute - MH - science lecture 
        Columbnia Univ, Lerner Hall, Arledge Audm.. 'Sea level rise: 
        Causes, impacts and options for solutions'. Free, adv regn 
        reqd. ei.columbia.edu 
    18:30 - CUNY Graduate Center - MH - Science and the Arts show 
        'TNo, No, Nobel' on women who missedthe Nobel Prize for 
        their work. Free. 212-817-7521, bschwartz@gc.cuny.edu, 
        scienceandarts@scienceandarts.pmailus.com, 
    19:00 - Toms River - NJ - Astro Soc of Toms Rv Area meeting 
        Ocean Co Coll, Student Ctr, Solar Lounge. Free. 
        www.astra-nj.org, 732-255-0343, webmaster@astra-nj.org 
    19:00 - NY Academy of Sciences - MH - astronomy lecture 
        'The unification of physics: The ques for a Theory of 
    20:30 - West Reading - CT - clearsky starviewingh 
        New Pond Farm, obseratory. $10, adv regn reqd. , cancelled for 
        clouds. www.newpondfarm.org, 203-938-2117, 
    20:30 - Princeton - NJ - clearsky starviewing 
        Princeton Univ, Peyton Hall. Free. Cancelled for clouds 
        www.astro.princeton.edu/observatory/publicobserving.php,//, 
        jeg@astro.princeton.edu, lee@astro.princeton.edu 

General news
 ----------
    June is the first of each year's two 'sea-change' of astronomy 
activity. Events running on a school-year schedule go into recess 
while summertime events start up. In Sep-Oct the change-over reverses. 
I some times have the case of an event having no session in May, being 
in the '???' section, and still having no instance for June. I follow 
that event's pattern from prior years, usually placing it in the 'S/O' 
section. 
    World Science Festival runs into June 2018, ending with a 
science street fair in Washington Sq on the 3rd. NYSkies works with 
the Festival on Saturday the 2nd at Pier 1, Brooklyn Bridge Park. We 
are astronomy resource crew to distribute star & planet charts, point 
out the stars, handle astronomy questions. Event features a science 
lecture, starviewing, and music/dance, all starting at 7PM. Event 
could be called off for adverse weather. 
    Alley Pond Enviro Ctr notes that its monthly astronomy nights 
include an indoor talk. The event is weather independent. NYC Events 
previously listed it as 'clearsky starviewing, cancelled for clouds'. 
    The 'Jews in space' exhibit at VIVO Instt continues to late June 
2018, from intense public interest. There is also an extra lecture 
honoring israel's first astronaut Ilan Ramon on June 21. 
    Our Seminar on June 1 is one day after the May Manhattanhenge 
window. We will step outside to watch the Sun set a bit off of the 
line of 14th St. The Seminar on July 6 is a couple days too early, but 
we'll again watch an off-centered sunset. 
    In 2018 the United Nations staged several public events on a wide 
range of subjects. None so far were astro/sci. With reconstruction at 
the UN winding down, some offices found that events opened to 
outsiders as a UN effort to alleviate construction nuisance, improved 
public awareness of their work. They on their own  continue to offer 
events to the public, now without the targeted invites, like the ones 
I sporadicly got over the past several years. You do have to register 
and sometimes pick up a visitors pass to enter the campus. Almost all 
are short-notice events, missing the upcoming NYC Events. Events of 
potential interest for NYSkiers will be posted in our Yahoogroup and 
email list. Please mind well that the topic could be thoroly 
repulsive, even tho it is considered worthy of UN attention. 
    Montauk Obsy has three events in June 2018 at different locations 
hours and locations. See under June 15, 27, 29. 

City News 
 -------
    Amat Obsrs Soc on 18 May 2018 called off its 'City of stars'  tour  
for 19 May for impending rain. Rain date is June 2nd. The 19th was 
rainy, shifting between thin drizzle and strong downpour.  
    At the NYSkies Seminar on 18 May 2018 Steve Kaye described his 
recent trip to St Louis MO. While there he visited Cahokia, remains of 
a preColumbian  society just across the Missouri Rv in Collinsville 
IL. He examined Woodhenge, in replica because the original wood 
structure long ago decayed. He showed, with handouts of an article, 
that the inhabitants used it to keep track of seasons and lunar 
motion, similar to Stonehenge. 
    World Science Festival in April-May 2018 found that unauthorized 
outfits were soliciting as the Festival. NYSkies received a couple, 
requests, which we handed over to the Festival for investigation. 
Festival advises that supporters work only with its official agents. 
    NYSkies Astronomy Seminar on 4 May 2018 explored the planets 
Jupiter and Saturn, now coming into the nightfall sky. We also 
refreshed our mind for Mars, topic of a few sessions ago. Mars is 
still an owl-hour object but increasingly under watch by observers. 
Jupiter slided east one more zodiac constellation since 2017, then in 
Virgo, now in Libra. He takes one year per constellation to fill out 
his 12-year circuit thru the zodiac. Saturn dwells in Sagittarius, 
taking for about 2-1/2 years in each constellation to complete his 29-
year round of the zodiac. For the next several years we'll discuss 
Jupiter and Saturn together in one session. here to gore we treated 
the two in separate sessions. The planets are now closing together 
toward a major conjunction in 2020. Such meetups come at 20-year 
intervals, the last few in 2000, 1980, and 1960. Yes, I saw ALL THREE 
of them! Mars, Jupiter, Saturn are in or approaching their 
oppositions. They go thru retrograde loops. Those for Jupiter and 
Saturn are sways to-fro more than 'loops', like that coming up for 
Mars in June. We saw that the progress of all of the planets is best 
monitored with binoculars, since many of the stars around them are 
dim. The loops invite photography, specially in a series a week apart. 
Unlike mars,  Jupiter and Saturn stay about the same brightness all 
the time. They do get dimmer near solar conjunction, but then they are 
in twilight with few background stars. In contrast, Mars is steadily 
on the increase, to surpass Saturn and then Jupiter by late July. The 
wide range of brightness for Mars comes from the 5-to-1 range of his 
angular diameter from opposition to superior conjunction. Jupiter as a 
telescope target is always a delight. In the smaller scopes his moons 
dance around him. Larger scopes reveal the cloud bands and the Great 
Red Spot. The GRS waxes and wanes in prominence yearly and also drifts 
in longitude around the planet.. Planetarium software that simulate 
close-up views of the planets usually use a stock map of clouds but 
then need an addiurnate longitude fo the GRS. This is taken from a 
current Jupiter observing source, like an astronomy magazine or web. 
The software then plots a reddish spot at the proper longitude for the 
GRS. Jupiter illustrates the flip-flop in orientation for astronomy 
pictures, now with north at top. Traditionally south was at top 
because early telescopes had as few optical surfaces as possible, 
maximizing the thruput of photons,. such scopes yielded 'up-side-down' 
images, south up for northern observers. Modern scopes with clearer 
lens material and image capture can produce views in any orientation. 
The GRS is in Jupiter's south hemisphere, being near the top of older 
pictures and near the bottom in modern ones. The moons orbit in 
Jupiter's equator plane, which is close to the ecliptic. The moons 
swing around Jupiter fro side to side rather than 'going around' him. 
Jupiter sources publish charts of the moons displacement east/west of 
the ball and tables of events among them. These include eclipses, 
transits, occultations against the ball.. Before 1970 the moons were 
numbered,I-IV. To promote spaceprobe visits to Jupiter, NASA revived 
proper names assigned by Marius, never in common use: Io, Europa, 
Ganymmede, Callisto. None of Jupiter's other 60ish moons are visible 
in home telescopes. Saturn presents a beautiful scene more or less 
static for each apparition. His rings are still wide open, starting to 
close up since maximum phase in 2017. The north face is tilted to us 
now. We saw how tough it was to properly interpret crude scope views 
of Saturn in the 1600s. Galileo drew Saturn as a triple planet, 
assuming the ring ansae were companion spheres. Huygens in mid-1600s 
sussed out the annular nature, showing that the rings are fixed in 
space and we see them fro different asides during Saturn's motion 
around the Sun. We learned that the last edge-on phase, when the rings 
disappeared in small scopes, was in 2009. The previous maximum south-
side phase ws in 2002,. Then maximum north-side open was in 2017, next 
edge-on in 2024. Some of us wondered if the colors shown in modern 
pictures of Jupiter and Saturn are real because most times they see 
the planets in small scopes as 'black-&-white' or in a single weak 
tint. In some telescopes of the 1970-1990 period, colors were muted by 
suboptmal design and build, a situation that dissuaded planetary 
observing for a long while. Modern scopes do give good color 
rendition. Some observers inspect the planets in twilight. Colors 
stand out without the glare and contrast of a dark sky background. Of 
Saturn's moons, five or six are within reach of home scopes. Titan, 
the largest moon, is always in sight, altho it can be missed as a 
field star. The others require careful skill and a detail chart for 
the day and hour of viewing. The moons run concentric with the rings, 
going around Saturn, making it all the harder to identify them. We 
noted that the rings are a plane of separate rocks and boulders, 
individual moonlets. This was suggested in the mid 1800s and confirmed 
in the early 1900s A solid ring could never be stable, keeping 
centered on the ball, and would tear apart under tidal and centrifugal  
forces across its width. The rings are lettered A,  outer, and B, 
inner, separated by Cassini's division. The Crepe ring, ring C, is 
sometimes seen as a shading on the inner edge of ring B. We finished 
the session with a look at the just-issued picture of the Milky Way by 
the Gaia project. It was compiled from the craft's survey of 1.7 
billion stars. A large picture in the takeaway showed the the all-sky 
scene of our Milky Way in full color. We'll study this again at the 
next session. Takeaways were maps of Jupiter and Saturn paths in sky, 
close-up views of both planets, sample tables of Jupiter moon 
positions and events, example early drawings of Saturn, Huygens's 
diagram of the tilted rings, general array of Saturn moons, angular 
extent of Jupiter moons if all were somehow visible to eye or 
binoculars, views of Saturn at several oppositions. 
    On 10 May 2018 NYSkiers helped fill ISAW's lecture hall to hear 
about Islamic science penetration into Europe in the 15th-17th 
centuries. The appreciation of astronomy, mathematics, medicine was 
demonstrated, in spite of political and military hostility against the 
Arab infiltration into europe. 
    NYSkies Astronomy Seminar on 18 May 2018 walked thru the backdoor 
from blackholes to Einstein relativity. I gave a slideshow on 
blackholes, the backdoor to relativity, to Amateur Observers Society 
in April. The audience lost way because there were no takeaways and it 
couldn't keep track of the maths from the slides on screen. This 
present Seminar was a major upgrade with the maths in takeaways and a 
healthy dialog among the astronomers. Every one seemed to be heading 
in the path toward personal pursuit of relativity, banking off of 
their familiarity with blackholes. Explanations of blackholes are 
reasonably mature and most home astronomers do understand how 
blackholes work. We recalled that descriptions for home astronomers of 
relativity, special and general, often are so shallow that the subject 
seems too complex to understand. We saw that te main difficulty with 
relativity was that its effects and phaenomena are so small with few 
convincing examples to illustrate them. A blackhole is the extreme 
case of general relativity whose behavior is dramaticly different from 
that experienced  far from the blackhole. Without realizing, a home 
astronomer is comparing a regime of spacetime in a strong gravity 
field with that in his own, safe, weak field. We began with a review 
of Newton's laws of motion and gravity. We saw immediately that Newton 
ran into the concept of a blackhole! His inverse-square law and 
replacement of a bulk mass by a point mass produce a runaway growth of 
gravity field strength with proximity to the point mass. This is in 
essence the blackhole. Newton avoided this situation by asserting that 
all real bodies have a surface o block too-close proximity to the 
central point, keeping a finite gravity field strength. Newton also 
had problems with 'mass'. He used it as the property of matter to 
resist change of motion and also as the property that generates a 
gravity field. The two are distinct features of matter, yet they 
seemed to be measured by the one parameter 'mass'. Newton by experiment 
found as best he could the two were identical. Until the late 20th 
century we weren't sure why 'mass' stands for both gravity and 
inertia. We didn't know at the meeting what the newly-found Higgs 
boson tells us. Nothing more was done until Michell in late 1700s 
proposed that the largest stars in space could not be seen because 
their escape velocity is greater than lightspeed. The worked with 
imperfect numerical values but came up with a star's maximum radius is 
500 times the Sun's, assuming the same density. He worked with 
Newton's formula for the combination of mass and radius until it 
 made the escape velocity equal to lightspeed. He also note that the 
presence of such a 'dark star' is revealed if luminous, visible, 
bodies orbiting it. We reminded that some blackholes today are studied 
by monitoring their orbiting stars. Today we usually hold the mass 
constant and let the radius shrink. When it reduces to a value that 
makes escape speed equal lightspeed, we have the blackhole. For the 
Sun this radius is 2.9km (almost always rounded to 3km); Earth, 9mm. 
This limiting radius was first worked out from Einstein's theory by 
Schwarzschild in 1910s and is the Schwarzschild radius. So far we were 
going over much familiar territory, with most members adding their 
comments into the discussion. We next slided over to relativity, 
starting from the formula for escape velocity. First we transposed it 
to get o a statement of energy in a gravity field. A body when dropped 
from a given distance from the attrahent loses potential energy, which 
is converted into kinetic energy. We noted that the energy equation 
applies to other forms of energy, not only mechanical.. The goal now 
was to derive, in a backdoor method, the relativity connection of time 
or space between observers in two gravity fields. The blackhole model 
makes this easy because one observer is near the 'event horizon' while 
the other, Earth, is a safe distance away. We chose to work with the 
unit of time, rather than of length, called dT. To get to this unit, 
we needed an energy that is simple, yet contains dT. We picked the 
energy of a photon, given by E=h*f, h being Planck's constant. Because 
eventually this h will drop out of our formulae, we have E::f, 
E::1/dT. We wrote out the equations for energy near the blackhole and 
in ideally a zero gravity field. For all known blackholes we are so 
far away the gravity is zero. The result is that the perceived dT by 
the sage observer is related to that of the close-in observer by the 
ratio of observers's distances from the blackhole.  The safe observer 
perceives the close-om observer's dT as larger,  greater. Time seems 
slower to the safe person than for the close observer. In the limit as 
the close-in person approaches the event horizon, his time experienced 
at the safe observer stops, dT ->infy. His activity is 'frozen'. 
Blackholes were at first called 'frozen stars'. 'Blackhole' was 
initially treated as a naughty word, specially in Europe. By the 1980s 
it was in routine use, often as one word. We skipped a similar 
derivation for special relativity due to accidental omission of a page 
in the takeaway. We slided into special relativity ny applying logic.  
By comparing the relative speed between the two observers and 
lightspeed, the standing person perceives time at the moving person as 
slower. dT is greater. We noted carefully that in special relativity 
each person can be the 'standing' person and the effects at the 
opposite person are reciprocal. In general relativity thee is no 
symmetry of effect. Each person is actually in a different gravity 
field. We saw that 'time' is not just the reading on a clock, as in 
silly cartoons of space travellers seeing a wall clock running slow. 
Time applies to ANY AND ALL activity: heart beat, metabolism,, metal 
rust, wood rot. All these procede at a normal pace for the person 
attached to them but are perceived to run slower ny the other  
observer. Altho this Seminar was among the more mathematical ones, 
most members felt they were now better prepared to appreciate 
Einstein's theory of relativity, at least for comparing unit time 
between observers. Takeaways were the printed slides from the April 
talk.
    At the Seminar on 18 May 2018 we examined a full-color print of 
Gaia's new portrait of the Milky Way. It was issued in late April in a 
news piece from the Gaia office. We saw that toward the galactic 
center stars are mostly yellow. Around the anticenter stars are mostly 
blue. A couple astronomers explained that the center the older yellow 
supergiants. The spiral arms away from the center have younger blue 
supergiants. We mused that digital imaging of the MW in summer and 
winter may being out this same color distinction, but I have not heard 
of such attempts. 
    NYSkiers got a triple-whammy of shows about nuclear energy in May 
2018! On the 20th they heard what happened at the Ukraine's Chernobyl 
station. The lecture was at the Ukrainian Museum. On the 21st they 
explored how atomic powered submarines work, explained by a nuclear 
engineer from China. The talk was at the Pfizer Bldg. At National Grid 
HQ on the 24th they saw how a tsunami destroyed Japan's Fukushima 
power plant. All three shows were short-notice events missing May's 
NYC Events but posted in our Yahoogroup. 

Sky News
 ------
    May 2018 opened with a does of raw summer weather! Temps rose to 
the 30Cs with humid air and little breeze. Relief came on the 3rd in 
evening with a thunderstorm that grazed the City. It threw down wind-
blown rain and stirred up cool breeze. Storm passed south of NYC with 
typical thunder, lightning, heavy rain. 
    Overall May 2018 was a poor month for observing. We had a couple 
clear nights but most nights served up cloud or rain. Temps ranged 
from mild to full summer heat. 
    he omega Centauri hunt was a bomb-out in April-May 2018. The sky 
was never dark and clear enough to try for the globular cluster. I'll 
put up the challenge again in April 2019 for an other go at it. 
    No night in May 2018 was close to a potential Milky Way night. The 
window for possibly spotting the MW continues thru June 30. 
    Violent thunderstorm sweeped over NYSkies on 2018 May 15 mid 
afternoon thru night. It hit NYC and LI with heavy rain, but Metro-
North and New Jersey suffered felled trees, ripped-up power lines, and 
coastal flooding. Rail service in M-N was delayed by trees falling 
into tracks. Some roads and rails closed from storm debris blockage. 
    During thunderstorm of 2018 May 15 at least three tornados were 
touched down in NYSkies. One scored ground thru Orange & Sullivan 
county, NY. Other two were hit & run events in Putnam county, NY. All 
three were weak with central winds of up to 200KPH. No reported 
injuries, deaths, major structural damage. 
    Jupiter at nightfall moves into center south in June, followed by 
Saturn and mars in midnight-owl hours. The three are in their 
retrograde loops all summer: 
    -------------------------------------------------
    RETROGRADE LOOPS FOR MARS, JUPITER, SATURN IN 2018 
    -------------------------------------------------
    event        | Mars   | Jupiter| Saturn 
    -------------+---------------+-+------- 
    west station | Jun 26 | Mar  9 | Apr 18 
    opposition   | Jul 27 | May  9 | Jun 27 
    east station | Aug 27 | Jul 10 | Sep  6 
    --------------------------------------- 

    The 'ring flash' may be seen at Saturn's opposition on June 27, 
2018, but it demands continuous inspection of the planet for a couple 
weeks before and after opposition. It can not be obvious with only a 
look at opposition or with only sporadic views around hen.  The planet 
spikes in brightness, a few tenths magnitude, because at opposition 
the ring moonlets completely hide their shadows behind them. The 
entire ring surface is lighted. It may be best to take digital 
pictures of the planet in the sky repeatedly and asses the brightness 
against nearby stars.  This phaenomenon is a subtile one, often missed 
by experienced observers, even me.