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TESS Finds First Earth-Size Planet in the Habitable Zone

TOI 700 Artists' Illustration
TOI 700 d is the first Earth-size habitable-zone planet discovered by TESS, NASA's Transiting Exoplanet Survey Satellite.

About 100 light-years away, in our own Milky Way galaxy, in the constellation Dorado, sits a planetary system named TOI 700. It is home to TOI 700 d (illustrated here), the first Earth-size habitable-zone planet discovered by TESS, NASA’s Transiting Exoplanet Survey Satellite.

Image Credit: NASA/Goddard Space Flight Center