Audio-Video files for NYSkies Semiinar
    This page holds the audio-video files for our stay-home Seminars.  
Each Seminar has two files, named with the issue date (yymmdd), ending 
with 'a' or 'v'. 'a' is the audio file; 'v', video. For a made-up 
example, the files for our inaugural Seminar of 2005 March 17 are 
'050317a.mp3' and '050317v.ppt'. 
    Download the files to your computer for playing. Playing them 
directly from the web can cause chatter,skips, freeze.  Storing the files 
locally also allows you to play them away from the net and frees them 
for others to download. You may play the files at any time, not 
just on the issue date. 
     Set up the video file for its first picture and then start 
playing the audio file . The audio file prompts you 
to scroll to the next picture in the video file. The 
pictures are numbered for reference during the Seminar and 
for questions or comments afterwards.
    While there is n o live interaction with the sessions, you can 
put questions and comments to me thru the NYSkies email group at 

Besides myself, the other astronomers in the group may handle your 
    To subscribe to the group, send an empty email (any text in it, 
including the subject, is ignored) to

    The group is a general discussion forum for home astronomy, and 
not only for handling Seminar inquiries. Please put your notices and 
astronomy-related notices, news, questions there. 
    The files for the current and previous two Seminars are in this 
page below. Older ones are moved to offline storage. Be sure to keep 
those you want to play again in the future. 
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audio-video files for current and previous two Seminars

  210521a.mp3   210521v.ppt MANHATTANHENGE
   210604a.mp3   2100604v.ppt BINARY STARS
  210618a. no3   210618v.ppt   SUMMER STARS OVER NEW YORK
  210702a. no3   210702v.ppt   SKY OREINTATION
  210716a. no3   210716v.ppt    PERSEID METEOR SHOWER
  210806a. no3   210806v.ppt   VENUS IN 2021
  2108203a. no3   210820v.ppt   SATURN IN 2021 
  210903a. no3   210903v.ppt  JUPITER IN 2021
  210917a.no3   210917v.ppt   COOL CALM STARS OF SUTUMN
  211001a.mp3   211001v.ppt   OBSERVING THE NORTHERN LIGHTS
 211015a.mp3   211015v.ppt   CAUSES OF CELESTIAL SPECTRA 
 211105a.mp3   211105v.ppt    LUNAR ECLIPSE OF 2021 NOVEMBER 19 
 211119a.mp3   211119v.ppt    THE DOPPLER EFFECT
 211203a.mp3   211203v.ppt    COMET 2021-A1 (LEONARD_
 211217a.mp3   211217v.ppt    YEAREND GREETINGS FROM THE STARS
220107a.mp3   220107v.ppt    A BARE EYE STAR WITH A BLACKHOLE COMPANION
220121a.mp3   220121v.ppt    KEPLER'S LAWS OF PLANETARY MOTION
220204a.mp3   220204v.ppt    HUNTING FOR EXTRASOLAR PLANETS
220218a.mp3  220218v.ppt    WHAT ARE ORBITAL ELEMENTS?
220304a.mp3  220304v.ppt    SPRINGTIME IN THE STARS  
220318a.mp3  220318v.ppt     FIRST CRESCENT OF THE NEW MONTH 
220401a.mp3  220401v.ppt    THE OMEGA CENTAURI CHALLENGE  
220415a.mp3  220415v.ppt    STELLAR SPECTRAL TYPES
220506a.mp3  220506v.ppt    LUNAR ECLIPSE OF 2022 MAY 15-16
220520a.mp3  220520v.ppt   MANHATTANHENGE
220603a.mp3  220603v.ppt   THE ASTROLABE
220617a.mp3  220617v.ppt   SUMMER STARS OVER NEW YORK
220701a.mp3  220701v.ppt   OBSERVING ASTEROIDS
220715a.mp3  220715v.ppt   SATURN IN 2022
220805a.mp3  220805v.ppt   PERSEID METEORS IN 2022
220819a.mp3  220819v.ppt   JUPITER IN 2022
220902a.mp3  220902v.ppt  ASTROLOGY FOR ASTROOMERS 
220916a.mp3  220916v.ppt  NEW YORK SKIES IN FALL 2022 
221007a.mp3  221007v.ppt  MARS IN 2022
221021a.mp3  221021v.ppt  LUNAR ECLIPSE OF 2022 NOVEMBER 8
221104a.mp3  221104v.ppt  HORIZONTAL ECLIPSES
221118a.mp3  221118v.ppt  HERTZSPRUNG RUSSELL DIAGRAM
221202a.mp3  221202v.ppt  THE STARS OF WINTER 2022-2023