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 2005
Callisto
Most star names have reached us from antiquity, but solar system objects still are being discovered — and named — today.
By Michael E. Bakich // Published: August 29, 2005
LISA Pathfinder
A cooperative mission will pave the way for investigating dark energy, black holes, and gravity waves.
By Francis Reddy // Published: August 29, 2005
Resources
Learn more about topics from the October 2005 issue.
Published: August 29, 2005
See cosmic strings writhe and change in the early universe, courtesy of a computer called COSMOS.
By Francis Reddy // Published: August 29, 2005
Northern Cygnus Star Clouds
Now that you've located the objects discussed in the October article, let's go after more dazzling treats in Cygnus the Swan.
By Phil Harrington // Published: August 29, 2005
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