TOI 700, a planetary system 100 light-years away in the constellation Dorado, is home to TOI 700 d, the first Earth-size habitable-zone planet discovered by NASA’s Transiting Exoplanet Survey Satellite. (Image Credit: NASA’s Goddard Space Flight Center)
NASA recently announced the discovery of a new, Earth-sized planet in the habitable zone of a nearby star called TOI-700. We are two of the astronomers who led the discovery of this planet, called TOI-700 e. TOI-700 e is just over 100 light years from Earth — too far away for humans to visit — but we do know that it is similar in size to the Earth, likely rocky in composition, and could potentially support life.
You’ve probably heard about some of the many other exoplanet discoveries in recent years. In fact, TOI-700 e is one of two potentially habitable planets just in the TOI-700 star system.
Habitable planets are those that are just the right distance from their star to have a surface temperature that could sustain liquid water….
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