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.
September 2012
God-save-the-queen
By David J. Eicher // Published: August 14, 2012
moon_0605_dh_500
You'll see something cool whenever you point your telescope at the Moon.
By Michael E. Bakich // Published: July 23, 2012
Black-hole
A galaxy’s central black hole roars to life when a normal star ventures too close.
By Richard Talcott // Published: July 23, 2012
God-save-the-queen
You know him best as guitarist, singer, and songwriter from the rock group Queen, but Brian May is also a Ph.D. astronomer, popularizer of the cosmos, stereophotography enthusiast, and advocate for animal rights.
By David J. Eicher // Published: July 23, 2012
ska_reionization
Astronomers are planning huge radio arrays to investigate the birth of the first structures.
By Liz Kruesi // Published: July 23, 2012
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