This page holds the 2021 audio-video files for our stay-home Seminars, 
starting with the inaugural session in February 2021. Files for later years 
are HERE.
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. 
 = = = = =
audio-video files for current and previous two Seminars
210219a.mp3  210219v.ppt  FEATURES OF STAR  ATLASES [inaugural digital session]
210305a.mp3  210305v.ppt  FIRST CRESCENT OF A NEW MONTHpt
210319a.mp3  210319v.ppt  SPRINGTIME AMONG THE STARS
210402a.mp3  210402v.ppt  THE OMEGA CENTAURI CHALLENGE 
210416a.mp3  210416v.ppt  THE MILKY WAY AND DEEPSKY OBSERVING
210507a.mp3  210507v.ppt  THE SOLAR ECLIPSE OF 2021 JUNE 10
 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
 Files for later years  are HERE.