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Distant planet gains 2nd atmosphere through volcanic activity

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Washington, March 12 : Scientists 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 hypothesised 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 is when things got interesting.
To the surprise of astronomers, NASA’s Hubble Space Telescope observed an atmosphere which, according to their theory, is a “secondary atmosphere” that is present now.


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