SUNSET: 
ASTRONOMY & OBSERVING NEWS
Once-in-a-Century Impact Made a “Cold Spot” on the Moon
In watching an impact's aftermath, scientists have confirmed that such large blasts shake up and cool wide swaths of the lunar surface.
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Where to Look Tonight
This Week's Sky at a Glance, September 11 – 20
This Week's Sky at a Glance, September 11 – 20
Very low after sunset, the crescent Moon steps past Venus from Sunday to Monday. A couple days later, it steps past higher Antares.
where to lookSeptember Podcast: Vega & Its Vicinity
Sky Tour Podcast
This episode takes you on a tour of the stars and planets that you’ll see overhead during September. First, we’ll check out this month’s equinox and Harvest Moon; then we’ll track down the bright planets, explore some lesser-known constellations, and bounce around the Summer Triangle. It’s a great introduction to the late-summer sky. So grab your curiosity, and come along on this month’s Sky Tour.
Subscribe NowI Spy the Moon
I Spy the Moon
Tracking the phase, moonrise, and nightly position of the Moon can help give a tempo to life and its seasons.
Read moreEditor's PICKS
Photographer: Ernie-Jacobs
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Eagle Nebula from Both Hemispheres
Photographer: nazmus
Photographer: Jeff Phillips
Photographer: Markus-Mugrauer
Photographer: Darrin Williams
Photographer: George Preoteasa
Cosmic Snake - Mandel-Wilson 9 and IC4635
Photographer: nazmus
Photographer: Chris-Schur
Photographer: bellavia
Photographer: bellavia
Photographer: Kunihiko Okano
Photographer: Michael Teoh
Photographer: Hal Heaton
Photographer: senolsanli
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This Month’s Issue
Sky & Telescope Magazine
Explore the astronomy magazine that’s been out of this world for more than 80 years. This month, join us as we check in on the landers and rovers heading to the Moon!
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Issue Highlights
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Scorched
Camille M. Carlisle
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Sunspots and the Dawn of Modern Science
Nicola Cusanelli
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M76: The Not-So-Little Dumbbell Nebula
Howard Banich
