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.
December 2012
02_IC63
Browse 12 more nebulae and galaxies from this often-neglected list.
By Michael E. Bakich // Published: October 29, 2012
02_Southern-Cross
The Herschel Space Observatory has captured many views of stellar birth — the environment and the various stages.
By Liz Kruesi // Published: October 29, 2012
Self-portrait
These videos show off some of the Mars Science Laboratory team's greatest trials and tribulations.
By Bill Andrews // Published: October 29, 2012
03_Chesak
Each astrophotographer puts his own touch on M42.
By Michael E. Bakich // Published: October 29, 2012
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