see http://cantonbecker.com/retrograde for details…
Planning on staying up late (or waking up early) for this one. The Geminids is the “king” of the meteor showers. It is considered by many to be the best shower in the heavens, producing up to 120 multicolored meteors per hour at its peak. It is produced by debris left behind by an asteroid known as 3200 Phaethon, which was discovered in 1982. The shower runs annually from December 7-17. It peaks this year on the night of the 13th and morning of the 14th. The first quarter moon will set shortly after midnight leaving dark skies for what should be an excellent early morning show. Best viewing will be from a dark location after midnight. Meteors will radiate from the constellation Gemini, but can appear anywhere in the sky
The Ursids is a minor meteor shower producing about 5-10 meteors per hour. It is produced by dust grains left behind by comet Tuttle, which was first discovered in 1790. The shower runs annually from December 17-25. It peaks this year on the the night of the 21st and morning of the 22nd. This year the glare from the full moon will hide all but the brightest meteors. If you are extremely patient, you might still be able to catch a few good ones. Best viewing will be just after midnight from a dark location far away from city lights. Meteors will radiate from the constellation Ursa Minor, but can appear anywhere in the sky.
The winter solstice is the shortest day of the year, respectively, in the sense that the length of time elapsed between sunrise and sunset on this day is a minimum for the year. Of course, daylight saving time means that the first Sunday in April has 23 hours and the last Sunday in October has 25 hours, but these human meddlings with the calendar and do not correspond to the actual number of daylight hours.
If you life in the southern hemisphere, this is your Summer Solstice, celebrating the longest day of the year.
http://scienceworld.wolfram.com/astronomy/WinterSolstice.html
Learn about the formation of supermassive black holes and what exciting new discoveries await us from the James Webb Telescope. Â Join NOVAC and one of the leading astrophysists in this field of study, Dr. Jenny Greene, Professor of Astrophysical Sciences at Princeton University.
When: 10/9/22, 7:30pm EDT
Where: Â Dr. Greene will present virtually. Â Those interested may meet at George Mason University, Exploratory Hall, Room 3301 (arrive as early at 6:30pm).
For those wishing to join virtually here is the link:
NOVAC General Meeting
Sunday, October 9 · 7:30 – 9:00pm
Google Meet joining info
https://meet.google.com/osh-bcyd-gti
Or dial: ‪(US) +1 484-430-1468‬ PIN: ‪486 839 001‬#
More phone numbers: https://tel.meet/osh-bcyd-gti?pin=1354183604637
Talk Title: The birth of supermassive black holes
Abstract: Supermassive black holes are ubiquitous at the centers of massive galaxies in the universe today, but we have no idea when or how these monsters are first formed. For the first time we have the chance to catch them as babies or adolescents just hundreds of millions of years after the Big Bang, thanks to the remarkable performance of the James Webb Space Telescope. I will discuss prospects for first results in this area in the coming year.
Jenny Greene is a Professor of Astrophysical Sciences at Princeton University, where she has been chasing intermediate-mass black holes for more than a decade. She is also the faculty director of the Prison Teaching Initiative.