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 2003
JIMO
NASA hopes the proposed Jupiter Icy Moons Orbiter will pick up where the Galileo mission left off.
By Vanessa Thomas // Published: August 5, 2003
HST View of the Orion Nebula
The Hubble Space Telescope has dedicated a lot of time to admiring the famous Orion Nebula.
Published: August 5, 2003
David Helfand
An astronomer offers his views on tenure.
By David Helfand // Published: August 5, 2003
Green Aurora
Simple cameras and off-the-shelf films make stellar portraits easy as 1-2-3.
By David Healy // Published: July 24, 2001
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