Space

NASA finds planet 100 light-years away that could be like Earth

TOI 700 e is an Earth-size world that orbits in its star's habitable zone, which means the planet's temperature could allow for water to be liquid.

Artist rendition of exoplanet TOI 700 e
Artist rendition of exoplanet TOI 700 e, provided by NASA.
NASA
SMS

Could there be life on another planet? Scientists with NASA found another spot in the Milky Way that could harbor life.

Astronomers have discovered exoplanet TOI 700 e, which is an Earth-size world that orbits in its star’s habitable zone. NASA believes the planet is about 95% the size of Earth and is likely rocky.

The planet was discovered using NASA’s Transiting Exoplanet Survey Satellite, which surveys thousands of exoplanets around nearby stars.

Lying in the planet’s habitable zone means the planet’s temperature could allow for water to be in a liquid state. If the planet is too hot, the water would boil away. If it’s too cold, it would become ice.

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TOI 700 e is among two planets in its star system that could harbor life. Planet d is also an Earth-size planet that orbits within the star’s habitable zone.

“This is one of only a few systems with multiple, small, habitable-zone planets that we know of,” said Emily Gilbert, a postdoctoral fellow at NASA’s Jet Propulsion Laboratory. “That makes the TOI 700 system an exciting prospect for additional follow-up.”

TOI 700 has been under investigation for some time. It took researchers an additional year to figure out the details of TOI 700 e.

“TESS just completed its second year of northern sky observations,” said Allison Youngblood, a research astrophysicist and the TESS deputy project scientist. “We’re looking forward to the other exciting discoveries hidden in the mission’s treasure trove of data.”

NASA said TOI 700 is a cool dwarf star located about 100 light-years from Earth. In total, NASA has discovered four exoplanets circling the star.