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.
May 2003
Titan's Haze
The Huygens probe will plunge into an alien atmosphere that may resemble that of early Earth.
By Nancy Griffis // Published: May 6, 2003
Palomar Observatory 200-inch Dome
Land-based observatories come in a wide variety of shapes and sizes. What is the science behind their look?
By William Schomaker // Published: March 27, 2003
AAS Symbol
Members of the AAS Minorities Committee talk with Astronomy editors about their continuing efforts to be recognized.
Published: March 27, 2003
Hoag's Object
This collection displays some of the universe's weirdest-looking galaxies.
By Vanessa Thomas // Published: March 27, 2003
FUSE Spacecraft
Graduate students talk about their experiences as members of large and small science projects.
By Maggie McKee // Published: March 27, 2003
Total Lunar Eclipse November 2003
A table of f/stops, film and shutter speeds for photographing a total lunar eclipse.
Published: March 27, 2003
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