Discover an Earth-like exoplanet in the habitable zone


Robert Klatt

Earth-like exoplanet TOI-700e

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  • the An exoplanet similar to Earth TOI-700e can be temperate climate and liquid water thus Providing adequate living conditions
  • I am TOI-700 Planet System There is, too Earth-like exoplanet TOI-700dwhich can also be usual
  • 2023 TESS Space Telescope and ground-based telescopes Examine the two life-friendly exoplanets closely

An Earth-sized exoplanet TOI-700e in the habitable zone of its star could provide habitable conditions. Mild climate and liquid water is likely according to the measurement data.

Seattle (USA). The TESS 2020 space telescope is about 100 light-years away outer planets Discover TOI-700d. TOI-700d is Earth’s near-perfect twin, orbiting its red dwarf in the middle of the habitable zone. So there may be liquid water on the surface of TOI-700d and a temperate climate that supports life.

Astronomy scientists Jet Propulsion Laboratory (JPL) from NASA has it on 241- Meeting New observational data from the TESS des Poops TOI-700, according to which there is another possible habitable world in this planetary system in addition to TOI-700d’s known Earth twin. Researchers led by Emily Gilbert discovered this using a much weaker fourth periodic shadowing that occurs in addition to the three known periodic shadows.

Transit signal from exoplanet TOI-700e

A detailed analysis of this periodic dimming has shown that it is a signal of a previously overlooked exoplanet transit. Exoplanet TOI-700e lies between its larger neighbor TOI-700c and twin Earth, TOI-700d.

“If the star was a little closer or the planet a little bigger, we might have found TOI-700e in the first year of TESS. But the signal was so weak that we needed another year of fleeting observations.”

Thus TOI-700 is one of the few systems with two exoplanets that are friendly to life.

“This is one of the few systems with multiple minor planets in the habitable zone.”

Livable conditions on TOI-700e

TOI-700e according to a preprint study published in arXiv It appeared, most likely a rocky Earth-like planet. The exoplanet is 95% the size of Earth and orbits its star in about 28 days. Hence it is located in the habitable zone of a red dwarf star. NASA calculations show that TOI-700e receives about 1.27 times the Earth’s solar radiation from its star. So an exoplanet would be much warmer than Earth, but it could have a mild climate with liquid water.

“The radiation in TOI-700e is located between Earth and Venus.”

to me astronomy TOI-700e is particularly interesting because until now there has been disagreement about whether Venus was a steam hell from the start or whether it had a habitable climate.

“The TOI-700 system now provides an opportunity to clarify the Venus question about similar exoplanets.”

No strong radiation bursts from a red dwarf

Additional observations with the Hubble Space Telescope also show that there are no strong bursts of radiation emanating from the red dwarf. If the star launches stellar flares, the conditions for life on TOI-700e would be much worse.

“All of this makes the TOI-700 system an exciting candidate for further observations.”

This year, the TESS telescope will once again observe the star TOI-700 and its four known planets. Astronomers also plan to make observations using ground-based telescopes.

arXiv, doi: 10.48550 / arXiv.2301.03617

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