• lud@lemm.ee
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      4 months ago

      Already, let’s go with the karman line like everyone usually does.

      • sugar_in_your_tea@sh.itjust.works
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        4 months ago

        I’d go with the mesosphere, because that’s where meteors burn up. That’s a little below the karman line and is defined by actual qualities, instead of an arbitrary number. Regardless, both exclude the ISS. :)

              • sugar_in_your_tea@sh.itjust.works
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                4 months ago

                But “the professionals” don’t agree. Most notably, the US Air Force says you’re an astronaut if you go above 80km (approx the start of the thermosphere), and NASA switched to that standard too. At 80-90km, you can sustain an elliptic orbit, and around 150km, you can sustain a circular orbit.

                The 100km Karman line doesn’t signify anything, it’s just a nice multiple of 10 that’s pretty close to more important points. It’s not based on science, the original science by Karman was the highest theoretical height for an airplane, which was just over 80km, it’s just a nice number close to actual science.

                So no, I’m not just going to accept 100km “because science.”

    • Fermion@feddit.nl
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      4 months ago

      No human has ever been not gravitationally bound to the earth. So really this type of showerthought seems to be too early. If we send astronauts to Mars, it will be easier to say they have been separated from Earth.

      • sugar_in_your_tea@sh.itjust.works
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        4 months ago

        Yeah, that’s probably a better metric.

        Would you count a permanent base on the moon? I think it should, since you’d be more impacted by the moon’s gravity than Earth’s, despite still being in Earth’s orbit.