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.
March 2007
Acoustic core collapse
Computer simulations provide unique insights into how stars explode.
By Francis Reddy // Published: January 23, 2007
magnetic field strengths
For the first time, simulations track intensified magnetic fields as neutron stars merge.
By Francis Reddy // Published: January 21, 2007
Cold weather wear
Use these precautions to make your winter observing safe and productive.
By Michael E. Bakich // Published: January 21, 2007
Web user icon
Internet Relay Chat brings amateur astronomers from around the globe together to talk turkey about their passion.
By Michael E. Bakich // Published: January 21, 2007
H-alpha labeled
A Hydrogen-alpha filter will give you a new perspective on our daytime star.
By Rod Pommier // Published: January 21, 2007
Lunar eclipse from Florida (October 27, 2004)
Learn how to observe this month's lunar eclipse.
By Phil Harrington // Published: January 21, 2007
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