Astronomers Find an Earth-Sized World That May Be Carpeted in Volcanoes By Nancy_A
Artist illustration of NASA’s Transiting Exoplanet Survey Satellite observing the heavens.
The two other worlds in the system were discovered in 2019, also with TESS. They are called LP 791-18 b and c, and the inner planet b is about 20% bigger than Earth. The outer planet c is about 2.5 times Earth’s size and more than seven times its mass and it too may also have an atmosphere. These two planets are ideal targets for the James Webb Space Telescope , so we’ll learn more about how the three planets interact with future observations.
If the planet is as geologically active as the research team suspects, it could maintain an atmosphere. With an atmosphere, the temperatures on the planet’s permanent night side could allow water to condense on the surface.
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