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 2010
August 2010 WE sun pillar
The beautiful zodiacal light visible in Earth's sky could have inspired the most iconic structures of ancient Egypt.
By Richard Talcott // Published: June 28, 2010
Sombrero Galaxy (M104)
For those of you just starting out observing, binoculars are a good beginner tool.
By Liz Kruesi // Published: June 28, 2010
August 2010 WE Scorpius dbls
Use a "historical" text as your guide to the Scorpion's best stellar couplings.
By Glenn Chaple // Published: June 28, 2010
August 2010 WE NGC 1761
You don't need a Ph.D. to contribute to astronomy research.
By Liz Kruesi // Published: June 28, 2010
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