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The name of the space telescope used to discover the 18th hidden earth sized Exo-planets is

  • A.Hubble
  • B.Kepler
  • C.Herschel
  • D.Spitzer

Answer: B

The telescope was Kepler.

In 2019 researchers re-analysing data from NASA's Kepler space telescope, gathered during its extended K2 mission, found 18 previously overlooked Earth-sized exoplanets. They used a new search method sensitive to smaller planets that earlier analyses had missed.

Hubble and Spitzer are also NASA space telescopes, and Herschel was a European infrared observatory, but the discovery came from Kepler's data.

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