Famous 'Pink Planet' harbors a salty surprise

Northwestern University-led astronomers have discovered salty skies surrounding the universe's famous "Pink Planet." For more than a decade, the ancient, rosy-hazed world kept astronomers guessing. One of the coldest known ...

Fermi mission uncovers possible sibling supernova remnants

A new study of two supernova remnants, the debris left behind after stars explode, suggests the explosions came from stellar siblings that once orbited each other. The first star's detonation sent its binary companion hurtling ...

Hubble glimpses merging galaxy clusters

This NASA Hubble Space Telescope image features a galaxy cluster called CL0016+1609, or MACS J0018.5+1626, that is very bright at X-ray wavelengths and is one of the most extensively studied clusters at X-ray and radio wavelengths. ...

Radar echoes from Europa reveal secrets beneath the ice

A team of scientists has used NASA's Goldstone Solar System Radar and the U.S. National Science Foundation Green Bank Telescope (NSF GBT) to carry out the most extensive radar study to date of Europa, the ocean world orbiting ...

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