Kepler space telescope

NASA space telescope for exoplanetology (2009–2018)

The Kepler space telescope was a space telescope launched by NASA in 2009 to discover Earth-sized planets orbiting other stars. Named after astronomer Johannes Kepler (who, ironically, was convinced that planetary systems did not exist around any of the stars) the spacecraft was launched into an Earth-trailing heliocentric orbit. The principal investigator was William J. Borucki.

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