description TOI-700 Overview
insights Why this score
TOI-700 ranks #65 of 217 in the Star ranking, behind Shaula, ahead of Gacrux.
Nearby M dwarf with Earth-sized habitable-zone planets, strong TESS-era reputation.
help TOI-700 FAQ
Why is TOI-700 important to exoplanet astronomers?
TOI-700 hosts TOI-700 d, the first roughly Earth-sized habitable-zone planet discovered by NASA's TESS mission. Its confirmation was announced in 2020, making the system an important target for studying potentially rocky worlds around red dwarfs.
How Earth-like is TOI-700 d?
TOI-700 d is about 20 percent larger than Earth and receives roughly 86 percent as much stellar energy as Earth receives from the Sun. Being in the habitable zone does not prove that it has liquid water, an atmosphere, or life.
How long does TOI-700 d take to orbit its star?
TOI-700 d completes an orbit in approximately 37 days. Its year is short because the planet orbits much closer to its cool M-dwarf host than Earth orbits the Sun.
Does TOI-700 have another planet in the habitable zone?
Yes, NASA announced TOI-700 e in 2023 as another approximately Earth-sized planet in the system's optimistic habitable zone. TOI-700 e orbits closer to the star than TOI-700 d and has a period of about 28 days.
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