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.
January 2003
It wasn't all science at a simulated Mars base in Utah last spring.
By Vanessa Thomas, Frank Schubert // Published: November 11, 2002
Mizar A Movie
An optical interferometer records the dance steps of the two stars of Mizar A.
By Vanessa Thomas // Published: October 5, 2002
OGLE-TR-56b
Astronomers search for new planets by staring at other suns.
By Christine Griffin // Published: September 3, 2002
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