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 2007
Emission nebula NGC 6357 in Scorpius
Use this Autostar tour with your computerized Meade telescope.
By Michael E. Bakich // Published: April 23, 2007
John Martin
Get the lowdown on Eta Carinae's mysteries from astronomer John Martin.
By Francis Reddy // Published: April 23, 2007
Continue your exploration of the Moon throughout June.
By Phil Harrington // Published: April 23, 2007
Sir William Herschel
Three members of the Herschel family are giants among those who laid the foundation of today's astronomical knowledge.
By Laura Layton // Published: April 23, 2007
Saturn’s north pole
Cassini's cameras continue to perform magic at the ringed planet — although they can't overshadow a terrific new Hubble movie.
By Richard Talcott // Published: April 23, 2007
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