NASA’s Spitzer Space Telescope data gives us a glimpse of the surface of a rocky, Earth-sized exoplanet outside of our own solar system orbiting the most common type of star in the galaxy, for the first time. The planet’s surface most closely resemble that of Earth’s Moon or Mercury, as in it has little to no atmosphere and could be covered in the same cooled volcanic material found in the dark areas of the lunar surface.
NASA’s Transiting Exoplanet Survey Satellite (TESS) has discovered several new exoplanets — planets orbiting stars outside our solar system — located just 31 light-years away from Earth. They are orbiting an M-dwarf star, called GJ 357 in the Hydra constellation. The star is 40% cooler than our sun and 1/3 of its mass as well as size. The first exoplanet discovered orbiting around the star was GJ 357 b.