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.
March 2008
Andromeda Galaxy
Computer simulations show the Andromeda Galaxy is consuming what was the seventh-largest galaxy in the Local Group.
By Richard Talcott // Published: January 24, 2008
Hercules
Learn how to measure the sky you see and find colorful doubles stars.
By Glenn Chaple // Published: January 24, 2008
M82
Astronomers have observed M82 for centuries, but this "irregular" galaxy in Ursa Major still commands their attention.
By Daniel Pendick // Published: January 24, 2008
distant galaxy sources
Caltech astronomers claim the most distant galaxies ever.
By Francis Reddy // Published: January 24, 2008
M33
Use binoculars to notch as many Messier objects as you can in a single night.
By Phil Harrington // Published: January 24, 2008
Merging spiral galaxies
New computer simulations show the warped reality of spiral-galaxy mergers.
By Daniel Pendick // Published: January 24, 2008
Orion BT70
Mount Orion's binocular telescope to a Celestron mount for ultimate two-eyed observing.
By Phil Harrington // Published: January 24, 2008
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