Which planet’s atmosphere is similar to Earth’s original atmosphere? Jupiter Mars Venus Mercury?

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  • Mark
    Lv 7
    8 months ago
    Favourite answer

    Venus, but it is too close to the sun, so there was a runaway greenhouse gas effect and all the oceans boiled away. Not leaving any bacteria to begin to change its atmosphere to approximately what there is today on Earth.

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  • 8 months ago

    Actually, none. Each different planet developed differently producing the atmosphere they have. Physical planet size and distance from the sun plays a major roll.

    Past events like meteor strikes change the game. Rotational period is involved. So is axis tilt.

    Mars for example has a far weaker magnetosphere so its mostly CO2 atmosphere is at the mercy of solar winds.

    Venus being much closer to the sun, just too hot and green house gasses dominate its atmosphere.

    Jupiter is massive compared to earth, Its greater gravity holds a lot of gasses in a very dense state, likely liquefying at the surface matter. Saturn, not a whole lot different. Very cold there.

    Long extinct vegetation shows Earth at one time had a very dense atmosphere, much more oxygen and humidity, just right for the vegetation to grow. That vegetation could not survive our atmosphere today, neither could the dinosaurs.

    Source(s): Too many scientific journals.
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  • 8 months ago

    Depends how you define "original".

    At first maybe there was a lot of hydrogen, so Jupiter. When that was driven off, CO2 would have been the dominate gas in the atmosphere, as with Venus. After most of the CO2 was absorbed by the Earth's crust, the atmosphere became a precursor of what it is today.

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  • 8 months ago

    Jupiter

    Look up the Urey Miller experiment in 1953.Earth is on its 3rd atmosphere. 

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  • 8 months ago

    Mercury

    Earth took its own time to produce an Atmosphere

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  • 8 months ago

    ..................Mars

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