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I searched for how measure gas weight and about gases in space

https://www.shutterstock.com/search/space+gases

https://education.seattlepi.com/gases-found-outer-space-5888.html

Will the weight of gas measurement in space as well as in other planets of the Solar system be different as compared to gas measurement on Planet Earth?

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    $\begingroup$ Are you aware of the difference between weight and mass ? $\endgroup$
    – StephenG
    Jun 1 '21 at 5:02
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    $\begingroup$ Please use the editor properly to insert a link. There is help provided in the editor. $\endgroup$
    – StephenG
    Jun 1 '21 at 5:05
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Weight is a property of mass which you can experience only when on the solid surface of a gravitating body - but not when you are in free fall. Yet even in free fall you retain your mass. Weight is the force the mass exerts on a scale (in the presence of and proportional to the strenght of a gravity field which pushes the mass onto that scale - which requires that neither is in free fall).

Mass itself is the fundamental property of any particle itself - independent of how much other mass is in its vicinity, thus independent of external gravity field around.

See also the wikipedia article on the distinction of mass and weight.

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