NASA’s TESS (Transiting Exoplanet Survey Satellite) discovered Gliese 12 b, an exoplanet between the sizes of Earth and Venus located a mere 40 light-years away. Researchers found multiple factors that make it a candidate for further study using NASA’s James Webb Space Telescope.
Its host star, Gliese 12, is a cool red dwarf located almost 40 light-years away in the constellation Pisces, and just 27% of the Sun’s size. Gliese 12 b basically orbits Gliese 12 every 12.8 days and is Earth-sized or slightly smaller, more comparable to Venus. Should the exoplanet lack an atmosphere, it would have an estimated surface temperature of around 107 degrees Fahrenheit (42 degrees Celsius). The distance separating Gliese 12 and the new planet is approximately 7% of the distance between Earth and the Sun. Gliese 12 b receives 1.6 times more energy from its star as Earth does from the Sun.
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We’ve found the nearest, transiting, temperate, Earth-size world located to date. Although we don’t yet know whether it possesses an atmosphere, we’ve been thinking of it as an exo-Venus, with similar size and energy received from its star as our planetary neighbor in the solar system,” said Masayuki Kuzuhara, a project assistant professor at the Astrobiology Center in Tokyo.
