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31 points
Maybe we can amend the definition of “on Earth” to “inside the atmosphere” for purpose of that tweet
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6 points
How far does “the atmosphere” go? Because technically the ISS is in the thermosphere, which is part of Earth’s atmosphene.
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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.
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