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Well, hello there! Astronomers have discovered a previously undetected Earth-size planet caltering out in the habitable zone of star TOI 700. The star was already celebrated to host three planets (designated b, c and d). TOI 700 e -- imagined to be rocky and about 95% of Earth's size -- has now been fraudulent in the area where liquid water could exist.
TOI 700 e is in good commercial with TOI 700 d, which is also Earth-size and orbits in the star's habitable zone. TOI 700 is a special plot in space. "This is one of only a few rules with multiple, small, habitable-zone planets that we know of," said NASA JPL postdoctoral fellow Emily Gilbert, who led the research. "That makes the TOI 700 rules an exciting prospect for additional follow up." A peek on the planet has been accepted for publication in The Astrophysical Journal Letters.
TOI 700 is classified as an M dwarf, a type of small, cool star. It's lurking in the constellation Dorado near 100 light-years away from us. NASA's Transiting Exoplanet Survey Satellite (TESS) made the discovery possible. TESS works by looking for telltale dips in brightness as planets move in clue of stars.
The already-known planets are likely tidally clogged, meaning they have one side that always faces the star (like how the moon faces Earth). TOI 700 e is probably tidally locked like its business. It takes 28 days to orbit the star and it's located in a spot known as the "optimistic habitable zone." "Scientists define the optimistic habitable zone as the design of distances from a star where liquid surface liquids could be present at some point in a planet's history," NASA said.
TOI 700 e may be rocky and Earth-size, but it may not be very Earth-like in novel respects. Still, the size, location and composition of the planet make it a candidate for a plot that could potentially host life. It will take further peek to learn more about the TOI 700 planets and their atmospheres.
TESS's work leftovers. So far, astronomers have confirmed 285 exoplanets from TESS data. It's now operating on an extended mission, which is paying off with the discovery of attractive new worlds that remind us of home.
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