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there is evidence that a planet around a

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distant star lost its atmosphere then

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gained a second one through volcanic

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activity according to scientists using

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nasa's hubble space telescope the planet

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gj1132b is hypothesized to have begun as

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a gaseous world with a rocky core

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starting out at several times the

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diameter of earth this so-called

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sub-neptune quickly lost its early

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hydrogen and helium atmosphere due to

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the intense radiation of the young hot

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star it orbits then the planet was

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stripped down to a bare core about the

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size of earth and that's when things got

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interesting

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to the surprise of astronomers hubble

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observed an atmosphere which according

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to their theory is a secondary

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atmosphere that is present now

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based on a combination of direct

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observational evidence and inference

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through computer modeling the team

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reports that the atmosphere consists of

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molecular hydrogen hydrogen cyanide and

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methane and also contains an aerosol

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haze

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scientists think hydrogen from the

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original atmosphere was absorbed into

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the planet's molten magma mantle then

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slowly released through volcanic

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processes to form a new atmosphere

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though this hydrogen continues to escape

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into space the secondary atmosphere is

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replenished by volcanic gases that seep

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through cracks in the planet's thin

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crust

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scientists are wondering how many other

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planets might have started out as gas

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giants but became smaller and rocky

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after their early atmospheres evaporated

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away

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astronomers hoped to use the upcoming

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james webb space telescope's infrared

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vision to detect hot areas of volcanic

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activity on the planet

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gj1132b might be orbiting a distant star

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41 light years away