Top news for December 21, 2008

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The Nuclear Option: Europe's Plan for Faster Space Travel.

The Martian Atmosphere is Sputtering

NASA's Top 5 Technical Challenges Countdown: #1: Survive the Lunar Night

Colliding Galaxies Tearing at Each Other with Gravity and Radiation

Surviving the Neptunian Desert

The Sun's Identity Crisis Solved

Webb Directly Observes a Frigid Exoplanet

Martian Supervolcano Peeks Through the Cloudtops

Filtering Terrestrial Contamination in the Search for Alien Signals

At Cosmic Noon, this Black Hole Was the Life of the Party