Astronomers using the NASA / European Space Agency’s Hubble Space Telescope have discovered a rocky exoplanet orbiting a distant star showing evidence of volcanic activity effectively repairing the atmosphere. The planet is known as GJ 1132 b, and scientists believe it has the same density, size, and age as Earth. One of the most interesting things about GJ 1132 b is that scientists believe it began as a gaseous world with a thick atmosphere.
Originally, Universe The radius of the Earth was several times and it was a planet known as “Sub Neptune”. The planet lost its primordial atmosphere of hydrogen and helium due to intense radiation from the beginning of the hot and small orbits. He stripped the planet’s atmosphere, leaving an empty core about the size of Earth.
Hubble’s recent observations revealed the secondary atmosphere replacing part of the planet’s original atmosphere. The secondary atmosphere is rich in hydrogen, hydrogen cyanide, methane, and ammonia. The data also shows that the planet has hydrocarbon haze.
Scientists believe that the original atmosphere was absorbed into the planet’s mantle of magma and is now slowly being released by volcanoes to form a new atmosphere. As the second atmosphere escapes into space, it is constantly replenished with hydrogen in the planet’s magma.
The ever-renewing atmosphere is described as a window into the geology of another world. GJ 1132 b’s observations also made scientists wonder how many terrestrial planets do not start this way. They may start out as sub-Neptunes and become terrestrial planets when their primordial atmosphere evaporates. GJ 1132 b is very close to its host star, a red dwarf, that completes an orbit around the star once every day and a half. It is tidal locked with the same side facing its star all the time.