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.
June 2011
Interacting-galaxies
The Hubble Space Telescope peered long and hard at a tiny region of the constellation Fornax, returning images of the youngest galaxies ever seen.
By Richard Talcott // Published: April 25, 2011
voyager1
Associate Editor Liz Kruesi
Published: April 25, 2011
Hercules Cluster

You won’t need a large telescope to spot these celestial wonders.

By Phil Harrington // Published: April 25, 2011
00
Learn about the people and places behind our opening collage for “A century of variable star observing.”
By Bill Andrews // Published: April 25, 2011
T-CrB-chart
Learn how to make your own light curves so you too can help contribute to the American Association of Variable Star Observers.
By David H. Levy // Published: April 25, 2011
Massive star dies
Computer simulations are more-accurately showing how massive stars die.
By Liz Kruesi // Published: April 25, 2011
Abell-85
Challenge yourself with this list of faint, dead suns.
By Michael E. Bakich // Published: April 25, 2011
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