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 2004
Supernova 1987A
This handy guide to late stellar evolution will help you differentiate one exploding star from another.
By Francis Reddy // Published: August 24, 2004
Saturn's south pole in the infrared
Even more fantastic images of the Saturn and its moons.
Published: August 24, 2004
Caldwell catalog
A checklist of observable objects listed in the Caldwell Catalog.
Published: August 24, 2004
James Webb Space Telescope
NASA is steaming ahead with plans for a 6.5-meter space telescope optimized for observing in the infrared.
By Richard Talcott // Published: August 24, 2004
Use the Star Dome to track the rocky asteroid
Published: August 24, 2004
Transit composite from Egypt
See the memorable sights of Astronomy magazine's Venus transit tours of Egypt and South Africa in this pictorial recap
Published: August 24, 2004
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