From the December 2009 issue

The year’s big stories

You've read the top 10, now here are 11 through 15.
By | Published: December 28, 2009 | Last updated on May 18, 2023
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.
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.”