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.
July 2007
Global view
Many people think of darkness as simply the lack of light, but actually there's a lot more to it than that.
By Brian Skiff // Published: May 28, 2007
Star trails above McDonald Observatory
Readers share more stories about seeing the "sky move."
By Glenn Chaple // Published: May 28, 2007
Eros
Remote spacecraft and Earth-based radar give us views of these solar system wanderers their discoverers only dreamed about.
Published: May 28, 2007
A Loopy Solar Prominence
The answer's not as straightforward as you might think, and even the question has some hidden assumptions.
By Richard Talcott // Published: May 28, 2007
Ophiuchus
Here's a quick look at three globular clusters that lie south of the objects featured in this month's column.
By Phil Harrington // Published: May 28, 2007
OWL views
Watch this 100-meter scope in action in this animation.
By Laura Layton // Published: May 28, 2007
vacuum chamber
Miniature versions of astrophysical plasma jets provide insights into their cosmic cousins.
By Richard Talcott // Published: May 28, 2007
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