The comet being studied by Europe's Rosetta spacecraft may be made entirely of pebbles, challenging currently held theories of how bodies form in the far reaches of the solar system.
A peculiar alien visitor has been found on the International Space Station -- but does it come in peace?
During the Rosetta's close flyby of comet Comet 67P/Churyumov-Gerasimenko on Feb. 14, the European spacecraft snapped images of the comet's 'belly' revealing a shadow of itself surrounded by a halo.
If observations made by ESA's Mars Express are indicative of similar processes seen on Earth, these ancient Martian hills may also hide hidden deposits of ice.
In the end, Europe's fifth and final space station freighter went out in more of a fiery blaze than with the big bang of its namesake.
From a distance of 100 kilometers, the European Rosetta mission captured a stunning overall view of Comet 67P/Churyumov-Gerasimenko and its strengthening jets of vapor.
About 100 minutes after blasting off aboard a Vega rocket Wednesday, the European Intermediate Experimental Vehicle made a parachute descent back to Earth, completing a successful test flight.
In this dreamy observation, staring down on Mars' south polar icecap, a European spacecraft has captured stunning ruddy swirls frozen in Martian ice, like cinnamon sprinkles and coffee mixing with the frothy milk atop a rich cappuccino.
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