A real-life "Tatooine," this planet was Kepler's first discovery of a planet that orbits two stars - what is known as a circumbinary planet. The Kepler space telescope is a retired space telescope launched by NASA in 2009. Named after astronomer Johannes Kepler, the spacecraft was launched into an Earth-trailing heliocentric orbit. Credits: NASA/JPL-Caltech

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Keywords: -, astronomer, circumbinary, discovery, earth-size, johannes, kepler, keplers, launched, nasa, orbit, orbits, planet, planets, real-life, retired, solar, space, stars, system, tatooine, telescope