Planet-hunting spacecraft launches
NASA’s planet-hunting spacecraft, Kepler, rocketed into space Friday night on a historic voyage to track down other Earths in a faraway patch of the Milky Way galaxy.
It’s the first mission capable of answering the age-old question: Are other worlds like ours out there? Kepler, named after the German 17th-century astrophysicist Johannes Kepler, set off on its unprecedented mission at 10:49 p.m. ET, thundering into a clear sky embellished by a waxing moon.
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