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.
August 2008
Earthlike exoplanet
Astronomy Contributing Editor Ray Jayawardhana explains how astronomers hunt for worlds beyond our own.
Published: June 23, 2008
Prisms
What binoculars are best for you?
By Phil Harrington // Published: June 23, 2008
Shoemaker-Levy 9
A lot has happened in astronomy these past 35 years, and it wasn't easy to whittle down our list of the top 10 discoveries. Here are five more breakthroughs that just missed our list.
By Richard Talcott // Published: June 23, 2008
Summer Milky Way
Surf these links to learn more about the 10 up-and-coming astronomers profiled in our August 2008 35-year anniversary issue.
By Daniel Pendick // Published: June 23, 2008
Helix Nebula
Read a sampling of stories from Astronomy since its beginning.
Published: June 23, 2008
M31
Explore a massive mosaic of our neighboring spiral.
By Francis Reddy // Published: June 23, 2008
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