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 2009
Uranus
Associate Editor Daniel Pendick talks about the ice giant, Uranus.
Published: October 26, 2009
December 2009 WE Rocky Kolb
Rocky Kolb is a professor and chair of the University of Chicago's Department of Astronomy and Astrophysics.
By Karri Ferron // Published: October 26, 2009
December 2009 WE Jill Tarter
Jill Tarter is the Bernard M. Oliver Chair for SETI Research and director of the Center for SETI Research at the SETI Institute in Mountain View, California.
By Karri Ferron // Published: October 26, 2009
December 2009 WE Juna Kollmeier
Juna Kollmeier is an astronomer with the Observatories of the Carnegie Institution in Pasadena, California.
By Karri Ferron // Published: October 26, 2009
December 2009 WE Max Tegmark
Max Tegmark is a professor of physics at the Massachusetts Institute of Technology.
By Karri Ferron // Published: October 26, 2009
Comet Halley
Use this table to refine your comet observing.
By Michael E. Bakich // Published: October 26, 2009
December 2009 WE Milky Way treats M42 (05)
These beautiful images will make your eyes water without cold weather.
By Michael E. Bakich // Published: October 26, 2009
December 2009 Super-Kamiokande
Many facilities have been involved in searching for these mysterious particles.
By Liz Kruesi // Published: October 26, 2009
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