NASA's TESS exoplanet-hunting space telescope wraps up primary mission

NASA's exoplanet-hunting TESS space telescope is done with its primary mission, but its search for strange new worlds goes on. TESS (short for "Transiting Exoplanet Survey Satellite") wrapped up its two-year primary mission on July 4, having discovered 66 confirmed alien planets and nearly 2,100 "candidates" that scientists still need to vet, NASA officials said.
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