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 2009
Associate Editor Daniel Pendick talks about black holes.
Published: August 21, 2009
October 2009 WE Pilachowski
Learn more about Caty Pilachowski, Amy Mainzer, and Evalyn Gates.
By Karri Ferron // Published: August 21, 2009
Epsilon Aurigae
Amateur observers can make important contributions to the scientific observing campaign focusing on Epsilon Aurigae.
By Daniel Pendick // Published: August 21, 2009
Andromeda Galaxy
Until 84 years ago astronomers thought the Milky Way Galaxy was the entire universe. Then they found that fuzzy objects in the sky were galaxies themselves.
By Liz Kruesi // Published: August 21, 2009
October 2009 WE lunar
Put this lunar target on your list in the next few years.
By Michael E. Bakich // Published: August 21, 2009
October 2009 WE NGC3628
This Halloween season, grab your telescope and scare up these spooky objects.
By Stephen James O'Meara // Published: August 21, 2009
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