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Cake day: June 18th, 2023

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  • mercano@lemmy.worldtoAntiMeme@reddthat.comTurn Around
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    2 hours ago

    There must be. When you’re standing on the moon, it goes on as far as the eye can see, and the Earth is a ball in the sky. The moon is 27% of the diameter of the earth, so o you need to be at a spot where the Earth is 3.7 (=1/0.27) times further away from you than the moon. That’s 50,789 miles above the moon’s surface, 188,110 miles above Earth.


















  • Germany didn’t choose hydrogen because of its greater lifting capacity, they had to use it because the US was the only country at the time with industrial quantities of helium, and they weren’t exporting it. The Hindenburg was originally planed to use helium, but once the Zeppelin Company resigned themselves to having to use hydrogen, they added addition passenger staterooms to take advantage of the excess lift capacity.