News tagged with comet

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Rosetta: To chase a comet

Comets are among the most beautiful and least understood nomads of the night sky. To date, half a dozen of these most heavenly of heavenly bodies have been visited by spacecraft in an attempt to unlock their ...

Jan 20, 2014 4.8 / 5 (4) 0

In search of time travelers

(Phys.org) —It started over a poker game. Astrophysicist Robert Nemiroff and his students were playing cards (for chips) last summer, chatting about Facebook. They wondered: If there were time travelers ...

Jan 06, 2014 2.5 / 5 (11) 4 | with audio podcast