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 2003
If you're interested in meteorite collecting, there are some online resources for you to visit.
By Michael E. Bakich // Published: September 30, 2003
Tycho Brahe studied the heavens meticulously without the aid of a telescope.
By Maggie McKee // Published: September 30, 2003
Nature has provided a few gifts to planetary scientists who study our distant red neighbor.
By Vanessa Thomas // Published: September 30, 2003
Hubble after Servicing Mission 3b
The Hubble Space Telescope has remained viable thanks to a series of servicing missions by NASA astronauts.
By Richard Talcott // Published: September 30, 2003
Get to know our Local Group with the help of a few good web sites.
By Richard Talcott // Published: September 2, 2003
Mount Wilson and CHARA
The site of some of the most important discoveries in the history of astronomy, the observatory has a lot to celebrate during its centennial.
By Maggie McKee // Published: July 1, 2003
Sunspot and Flare 20 August 2002
A mix of solar and deep-sky images taken by a master.
By Jack Newton // Published: July 1, 2003
M17
The September 2003 issue of Astronomy features 30 great images from the past 30 years. Here are some favorites that didn't make the cut.
By Tom Ford // Published: June 30, 2003
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