Planet May Be On Its Second Atmosphere

[Waspie_Dwarf]

Distant Planet May Be On Its Second Atmosphere, NASA's Hubble Finds

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Scientists using NASA's Hubble Space Telescope have found evidence that a planet orbiting a distant star may have lost its atmosphere but gained a second one through volcanic activity.

The planet, GJ 1132 b, is hypothesized to have begun as a gaseous world with a thick hydrogen blanket of atmosphere. Starting out at several times the diameter of Earth, this so-called "sub-Neptune" is believed to have quickly lost its primordial hydrogen and helium atmosphere due to the intense radiation of the hot, young star it orbits. In a short period of time, such a planet would be stripped down to a bare core about the size of Earth. That's when things got interesting.

  Read More: NASA/HubbleSite

 

[jethrofloyd]

This planet morphed from one type to another — and formed a second atmosphere

About 41 light-years from Earth is an exoplanet that lost one atmosphere but has seemingly gained a new one. Scientists also believe the planet, known as GJ 1132 b, has evolved quite drastically from a gaseous world to a rocky one the size of Earth.

It's the first time researchers have discovered a secondary, regenerated atmosphere on an exoplanet.

 

https://edition.cnn.com/2021/03/12/world/exoplanet-second-atmosphere-scn-trnd/index.html

[Abramelin]