The planet, called TOI 700 e, is about 95% of Earth’s size, is likely rocky, and could have liquid water on its surface, NASA said.
In 2020, Gilbert and a team of others announced the discovery of the Earth-size, habitable-zone planet d, which has a 37-day orbit, along with two other worlds.
Astronomers said the planets are probably tidally locked, meaning they spin only once per orbit and one side always faces the star — similar to how one side of the Moon is always turned toward Earth. The optimistic habitable zone is defined by scientists as the range of distances from a star where liquid surface water could be present at some point in a planet’s history. The space agency said finding other systems with Earth-size worlds in this region helps planetary scientists learn more about the history of our own solar system.This animation shows a Sun-like star orbiting Gaia BH1, the closest black hole to Earth, located about 1600 light-years away.
"If the star was a little closer or the planet a little bigger, we might have been able to spot TOI 700 e in the first year of TESS data," Ben Hord, a doctoral candidate at the University of Maryland, College Park and a graduate researcher at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, said in a statement.
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