Year of the Comet
Comet C/2011 L4 (PANSTARRS)

PANSTARRS information

Comet C/2012 S1 (ISON)

ISON information

Web Extras
Go deeper into the stories of Astronomy magazine. These online features bring you additional research, interviews, photos, and more our editors turned up while creating the stories for this issue.
October 2010
October 2010 WE Earthlike
Fascinating as it would be to discover an exoplanet similar to our world, there's a lot more to learn about when it comes to extrasolar planets.
By Bill Andrews // Published: August 23, 2010
Crab Nebula
The world of neutron stars wouldn't be complete with its "bad boys."
By Liz Kruesi // Published: August 23, 2010
Canon EOS 5D Mark II
Astronomy has kept up with the digital revolution.
By Michael E. Bakich // Published: August 23, 2010
M31
Each picture is worth a thousand words.
By Michael E. Bakich // Published: August 23, 2010
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