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TESS Discovers Its Third Small Exoplanet

  • TESS Discovers Its Third Small Exoplanet

KYIV—NASA’s Transiting Exoplanet Survey Satellite (TESS) has discovered its third small exoplanet, named HD 21749b. HD 21749b is about 2.8 times Earth’s size, which puts it in the category of a sub-Neptune. Surprisingly, it is also a whopping 23 times as massive as the Earth.

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