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.
November 2012
Eagle-nebula
Planets form from the dusty disks surrounding newborn stars.
By Richard Talcott // Published: September 24, 2012
Nice model
This computer simulation gives scientists hints as to why the solar system looks the way it does.
By Liz Kruesi // Published: September 24, 2012
Large Hadron Collider
Learn the details behind the Large Hadron Collider, the world’s biggest machine and the site of the recent Higgs boson announcement.
By Bill Andrews // Published: September 24, 2012
Yellow-octahedral-crystal
Mineralogists so far have discovered the following 11 minerals in presolar grains.
By Michael E. Bakich // Published: September 24, 2012
Crescent_Nebula
Sir Patrick Moore compiled his Caldwell Catalog to fill in the missing bright deep-sky objects from Charles Messier’s famous list.
By Karri Ferron // Published: September 24, 2012
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