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In mid-July, NASA's Dawn spacecraft swung into a yearlong orbit around Vesta, the second-most massive object in the asteroid belt between Mars and Jupiter. Since then, it has been snapping pictures of the protoplanet's rugged surface and beaming them…

Dec 15

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Asteroid Vesta Revealed

On December 12, Dawn maneuvered into its closest orbit yet around giant asteroid Vesta. The spacecraft is now circling Vesta at an altitude of about 130 miles. Since NASA's spacecraft dawn snapped into orbit around the object, it has been…

A worker at the "European Organization for Nuclear Research walks past a mural representation of the ATLAS Large Hadron Collider in Geneva, Switzerland.

Lake Superior is warming at an alarming rate, according to oceanographer Tom Johnson of the University of Minnesota Duluth. "As I started doing work in Lake Superior, I came to realize there had been very little done…