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NASA, ESA, and G. Bacon (STScI)

This is an illustration of the extrasolar planet HAT-P-7b passing in front of its sun. The planet is larger than Jupiter and is orbiting a star that is hotter than our Sun. Astronomers used the Hubble Space Telescope to study this planet for its one-millionth science observation, hunting for the presence of water vapor in the alien world's atmosphere.