NASA reported the discovery of an Earth-size planet, named TOI 700 d, orbiting its star in the “habitable zone”.
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TOI 700 d was found by NASA’s Transiting Exoplanet Survey Satellite (TESS) mission, which it launched in 2018. Very few such Earth-size planets have been found so far, including some by NASA’s Kepler mission, and this one is the first such discovery by TESS.
TOI 700 d measures 20% larger than Earth. It orbits its star once every 37 days and receives an amount of energy that is equivalent to 86% of the energy that the Sun provides to Earth.
The star, TOI 700, is an “M dwarf” located just over 100 light-years away in the southern constellation Dorado, is roughly 40% of our Sun’s mass and size, and has about half its surface temperature.
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