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.
December 2006
The Sun
Astronomers hope a proposed mission to study the Sun becomes reality.
By Brian Grimm // Published: October 21, 2006
Pluto
Follow Astronomy's coverage of Pluto, politics, and the planet paradigm.
Published: October 21, 2006
spacecraft bound for the Kuiper Belt
Propelling spaceships with antimatter may be closer to reality than you think.
By Francis Reddy // Published: October 21, 2006
M45
In addition to the Hyades, the constellation Taurus holds several other star clusters for binoculars.
By Phil Harrington // Published: October 21, 2006
Full Moon mosaic
Try these tips to create your own lunar mosaics using a webcam.
By Laura Layton // Published: October 21, 2006
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