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.
November 2003
Not to be outdone by Cassini, the six instruments onboard the Huygens probe promise to unveil Saturn's biggest moon.
By Richard Talcott // Published: November 21, 2003
These images portray the intense magnificence of globular clusters.
Published: September 2, 2003
Cassini wallpaper: Rings in UV
Investigate the structure of Saturn's rings as they pass in front of a star.
By Jeff Kanipe // Published: September 2, 2003
Use this contact information to find out more about the telescopes featured in the November 2003 issue of Astronomy.
Published: September 2, 2003
Simulations predict what might happen when our galaxy merges with the Andromeda Galaxy.
By Vanessa Thomas // Published: September 2, 2003
This timeline chronicles breakthroughs in astronomy that have altered how humans view the universe.
By Michael E. Bakich // Published: September 2, 2003
M10
Bob and Janice Fera share some of their work.
By Michael E. Bakich // Published: September 2, 2003
M33
Backyard astronomers capture the beauty of the Pinwheel Galaxy.
By Michael E. Bakich // Published: September 2, 2003
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