This Week’s Sky at a Glance, September 22 – 30

 
Friday, September 22
• Low in the west-southwest during twilight, spot the thin waxing crescent Moon. Can you see Jupiter to the lower right of it, by about 7°? (for North America.)
• Equinox: Autumn begins in the Northern Hemisphere, and spring in the Southern Hemisphere, at 4:02 p.m. EDT. This is when the Sun crosses the equator (both Earth's equator and the celestial equator) heading south for the season.
• Coincidentally, every year around when summer turns to autum