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.
April 2010
The expanding universe
Associate Editor Liz Kruesi
Published: February 22, 2010
April 2010 AC Cornelia Lang
Cornelia C. Lang is an assistant professor of astronomy and astrophysics at the University of Iowa in Iowa City.
By Karri Ferron // Published: February 22, 2010
April 2010 AC Robert Blandford
Roger Blandford is the director of the Kavli Institute of Particle Astrophysics and Cosmology (KIPAC) and a professor at Stanford University in California.
By Karri Ferron // Published: February 22, 2010
Allen Telescope Array
The SETI Institute and the University of California at Berkeley are using radio dishes to search for life elsewhere in our galaxy.
By Liz Kruesi // Published: February 22, 2010
NASA's New Horizons spacecraft began its journey to Pluto January 19, 2006. The most vital part of the mission since then occurred in February 2007, when it flew past Jupiter.
By Richard Talcott // Published: February 22, 2010
St. Mary's Hall
Experience the life of the great astronomer.
By Michael E. Bakich // Published: February 22, 2010
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