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.
July 2006
Venice
See the sites from Astronomy's tour of the Mediterranean while chasing the March 29 eclipse.
Published: May 26, 2006
101 Dalmatians
Spiders are just one of many strange landforms at the martian south pole.
By Francis Reddy // Published: May 22, 2006
SNAP
To answer big questions, scientists need to think big about their observing tools.
By Liz Kruesi // Published: May 22, 2006
Book icon
Discover this month's offerings of astronomy titles.
Published: May 22, 2006
Hercules chart
It's a bird! It's a plane! It's Hercules!
By Phil Harrington // Published: May 22, 2006
Bennett catalog
Use this printable list to target some spectacular celestial objects.
By Michael E. Bakich // Published: May 22, 2006
Saturn plots
The Cassini mission has already delivered fantastic images and groundbreaking science. Here's what's planned for its second act.
By Francis Reddy // Published: May 22, 2006
gamma-ray burst
Since the 1960s, various spacecraft have contributed to the current body of gamma-ray burst knowledge.
By Laura Layton // Published: May 22, 2006
The Butterfly Nebula (IC 1318)
Enjoy a variety of stunning nebulae in Cygnus.
By Laura Layton // Published: May 22, 2006
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