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.
February 2010
The Moon
These six maps will get you started observing the Moon.
By Michael E. Bakich // Published: December 28, 2009
As totality approached
Associate Editor Liz Kruesi
Published: December 28, 2009
February 2010 WE Hadron Collider
You've read the top 10, now here are 11 through 15.
By Liz Kruesi // Published: December 28, 2009
This quick guide will help you understand meteorite classifications.
By Michael E. Bakich // Published: December 28, 2009
February 2010 WE thermal map
Astronomers have been able to map the surface of this extrasolar world.
By Bill Andrews // Published: December 28, 2009
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