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Curiosity to Help Europe's ExoMars Ze Artist's impression of the European ExoMars rover exploring the Martian sur...

Could 'Planet X' Still be Lurking Out This artist's conception illustrates a giant planet floating freely without...

Extreme Earth Life Can Aid Search for An artist's concept depicts Kepler-69c, a planet 1.7 times the size of Eart...

Heads Up, Lights Out Saturday for Ear Millions of people around the world are expected to go dark for an hour on ...

Saving Ukrainian Zoo Animals from Sta As the flood of war threatens to engulf the Ukraine, modern-day Noahs strug...

Small World Discovered Beyond Pluto Artist's impression of dwarf planet 90377 Sedna that was discovered in 2003...

First Asteroid Found Sporting a Ring Artist's impression of asteroid Chariklo surrounded by two dense and narrow...

Earth or Not: New App Tests Your Terr The stormy skies over Brazil as seen by astronauts on board the Internation...

Hubble Zooms-in on Mars-Buzzing Comet Hubble image of comet C/2013 A1 (Siding Spring), before and after processin...

Rover Opportunity Celebrates Mars Spr Rover Opportunity's shadow stretches out across the rim of Endeavour Crater...