Year of the Comet
Comet C/2011 L4 (PANSTARRS)

PANSTARRS information

Comet C/2012 S1 (ISON)

ISON information

Subscriber Extras
Subscribe to Astronomy magazine today to receive in-depth articles and tips delivered direct to your door as well as all of these great online features as a subscriber bonus.

Track more asteroids and comets.  Explore and animate a 3-D view of the solar system.  View Saturn, Jupiter, and their moons as you'd see them through a telescope.

The interactive Star Atlas lets you pan around and zoom into the 24 full-color maps originally published in Astronomy's Atlas of the Stars.
Search Equipment Reviews
Product Type:
Manufacturer:
Keywords
Featured Review
 
Search Astronomy.com's library of questions. Enter the nature of your question below.
Latest Answers from Ask Astro
More Subscriber Features
Check out these other great subscriber features exclusive to Astronomy.com
The editors of Astronomy magazine bring you the latest science, new products, hobby tips, and more.
Summer observing targets for large telescopes
The Bug Nebula (NGC 6302)One of the strangest nebulae known makes a good target for large scopes. Th... Read more »
Summer observing targets for small telescopes
Video transcriptLet's start with an easy target. High in the sky, in the constellation Hercules, you... Read more »
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