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.
January 2005
Anne Kinney
In August 2004, astronomers took one step closer to discovering earthlike planets outside our solar system.
By Matt Quandt // Published: November 22, 2004
Exoplanet around brown dwarf 2M1207?
Astronomers have found more than 140 planets circling stars other than the Sun. Here's the scoop on all the known planets as of October 2004.
By Richard Talcott // Published: November 22, 2004
Temperature zoom-in
Computer simulations show how the universe may have created its initial generation of stars.
By Richard Talcott // Published: November 22, 2004
Sedna and possible moon
Astronomy further examines some of the year's top stories.
By Francis Reddy // Published: November 22, 2004
M45 star chart
See these great images of the Pleiades.
Published: November 22, 2004
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