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.
June 2012
10_Cats-Paw-Nebula
The Southern Hemisphere is filled with countless spectacular deep-sky objects to photograph.
By Karri Ferron // Published: April 23, 2012
Trading-card-example
Now you can print out and keep tabs on some of science’s most important figures in style.
By Bill Andrews // Published: April 23, 2012
Free-floating-planet
Here’s how astronomers detect free-floating planets.
By Michael E. Bakich // Published: April 23, 2012
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