Year of the Comet
Comet C/2011 L4 (PANSTARRS)

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Comet C/2012 S1 (ISON)

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Web Extras

The year's big stories

You've read the top 10, now here are 11 through 15.
By Liz Kruesi
Published: December 28, 2009
February 2010 WE Hadron Collider
The LHC’s ATLAS detector, illustrated here with two protons colliding, was the first to spot particle collisions November 23, just a week before the collider became the world’s highest-energy particle accelerator.
Photo by European Organization for Nuclear Research
The year 2009 saw a lot of big astronomy news stories that didn't quite make it into the top 10. In late 2009, the Astronomy staff met to discuss which ones to include in the top 10, and which just barely missed the list. Here's a look at the "next five."
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