Gravity measurements taken by the orbiting Rosetta spacecraft show the body of comet 67 P/Churyumov-Gerasimenko is about 75 percent dust and 25 percent ice all the way through.
On a January morning 10 years ago, tiny pieces of a comet landed on Earth inside of a spacecraft -- and these samples are still teaching us new things about the origins and evolution of our solar system.
A European spacecraft has spotted water ice on the surface of a comet, shedding new light on the formation and evolution of the icy object.
Welcome to 2016, space fans! With a new rover scheduled to land on Mars, a probe launching toward an asteroid, new info on Jupiter, and the Rosetta probe smashing into a comet on purpose, there's much to look forward to.
The comet being studied by Europe’s Rosetta spacecraft contains molecular oxygen, a surprising discovery that will force scientists to rethink details of how the solar system formed.
Scientists have discovered an unexpectedly regular cycle of ice formation and depletion on the surface of a comet, a pattern tied to an orbital dance of shadow and sunlight.
Scientists are developing a novel space robot that can take up the challenge of hopping and rolling over microgravity terrain while doing valuable science.
On Aug. 13, Comet 67P/Churyumov-Gerasimenko will reach perihelion, and with it the orbiting European Rosetta mission. Here's a brief rundown of Rosetta's observations of the icy body in the run-up to its day in the sun.
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