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This Week's Sky at a Glance

by Alan M. MacRobert
The thin Moon passes Venus low in the west in bright twilight this week. And Mars remains shining near Castor and Pollux high overhead after dark. > read more

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Messier 80, a globular cluster
The Milky Way's Killer Instincts
Don't let its graceful spiral form fool you: our home galaxy is a cannibal. It's long been accused of having gobbled up smaller dwarf galaxies in its vicinity — and two new observations make an ironclad case for the prosecution. > read more
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Photo Gallery
Constellation of Scorpius
Photo Gallery
See the latest amateur astrophotos from visitors to our online photo gallery. > read more

 

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IVAN SEMENIUK'S UNIVERSE
Sky & Telescope contributing editor Ivan Semeniuk reports on the latest findings in astronomical science. > read more
 
LET'S GO STARGAZING!
Astronomy doesn’t have to be hard! Inside here are articles for stargazers of all ages — in clear, easy-to-understand language. > read more
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