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.
August 2002
Using binoculars
Find out why binoculars can help you see more.
By Phil Harrington // Published: July 26, 2002
The Mice
A computer simulation demonstrates how "The Mice" were created and what will happen to the two galaxies in the future.
By Vanessa Thomas // Published: June 24, 2002
For an earthlike planet to form, the nebula which gave birth to its parent star must contain the "right stuff."
By Paul Morledge // Published: June 24, 2002
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