On Sept. 30, the European Space Agency concluded its Rosetta mission and the study of comet 67P/Churyumov–Gerasimenko. During the final month of the mission, NASA's planet-hunting Kepler spacecraft had a unique opportunity to provide a 'big picture' view of the comet as it was unobservable from Earth: Ground-based telescopes could not see comet 67P, because the comet's orbit placed it in the sky during daylight hours.
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