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 2003
Spirit's Arm
The arm of a Mars Exploration Rover can do a lot more than just reach out and touch something.
By Pamela L. Gay // Published: June 3, 2003
USNO 26-inch Refractor
An amateur astronomer recalls his "rediscovery" of Mars's moons with the U.S. Naval Observatory's 26-inch refractor.
By Geoff Chester // Published: June 3, 2003
fido
A mock-up of the Mars Exploration Rovers take scientists and engineers on an exploratory journey that tests their ability to one day rove on Mars.
By Pamela L. Gay // Published: June 3, 2003
Lagoon Nebula (M8)
Some Messier objects are great targets for 3-D observing.
By Jeremy McGovern // Published: April 27, 2003
The sun on 5 November 2000
This step-by-step guide outlines one way to create beautiful solar images.
By Jack Newton // Published: April 26, 2003
Hot Jupiter
Over 100 extrasolar planets have been discovered, but astronomers have yet to get their first glimpse of one. Learn why these distant worlds have proven so camera-shy and what astronomers are doing to capture them on film.
By Robert Naeye // Published: April 26, 2003
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