• cordlesslamp@lemmy.today
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    7 months ago

    TIL, there’s oxygen molecules above 240Km. I thought there’s hardly anything above 100Km and that’s why they set it as the lowest boundaries of space.

    • Cethin@lemmy.zip
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      7 months ago

      There is hardly anything. However, there’s never nothing. The atmosphere is a thin and continuously decreasing thing, but there’s no point where it stops. Space is nearly a vacuum, but technically not totally. It’s close enough that we normally say it is, but there are particles bouncing around.