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.
January 2004
Saturn Occults a Star
View amateur images of the most famous ringed planet.
Published: December 10, 2003
An amateur astronomer's travelogue details a once-in-a-lifetime experience at Mauna Kea.
By Walter Cruttenden // Published: December 1, 2003
Scientist opposes prevailing theory about powerful cosmic explosions at Santa Fe meeting.
By Steve Koppes // Published: November 30, 2003
A complex array of a dozen instruments will allow the Cassini orbiter to probe Saturn, its rings, its moons, and its environs.
By Richard Talcott // Published: November 21, 2003
Buzz Aldrin
By the late 1940s, a grand plan for conquering space was already on paper. Why it didn't transpire as planned offers food for thought today.
By Robert Burnham // Published: November 21, 2003
SEARCH SITE
Subscriber Only Access
Subscriber Only Content
Look for this icon. This denotes premium subscriber content. Learn more »
Become a Member of Astronomy.com
Register today for access to more valuable resource information.
Interact in our forums, comment on articles, receive our newsletter and much more!
Not a member?
Subscriber and Member Login
Password
Remember me