Halfway to Pluto
Halfway to Pluto, NASA's New Horizons probe has woken up in 'exotic territory.' Mission controllers are taking the opportunity to give the spacecraft a thorough system's check in preparation for its Pluto flyby in 2015.
Strange Martian Spirals Explained
Using new data from the Mars Reconnaissance Orbiter, researchers have finally uncovered the secrets of the mysterious troughs that snake through the Martian ice cap like a spiraled maze.
What is a Planet?
Our understanding about the universe and our place in it has changed over time. New information can cause us to rethink what we know and reevaluate how we classify objects in order to better understand them.
Voyager Makes an Interstellar Discovery
The solar system is passing through an interstellar cloud that physics says should not exist. In the Dec. 24th issue of Nature, a team of scientists reveal how NASA's Voyager spacecraft have solved the mystery.