https://xkcd.com/2908

Alt text:

Astronomers are a little unsure of the applicability of this index, but NASA’s Planetary Protection Officer is all in favor.

  • @[email protected]
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    143 months ago

    Is our moon really that big? I thought Charon-Pluto is kinda a special cases that they look like twin planets instead

    • @[email protected]
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      3 months ago

      It’s the largest relative moon (fifth largest in absolute terms) of any planet (sorry Pluto) and is more than a quarter as large as the earth itself. It’s also relatively further from the planet than most moons in the solar system.

      Fun fact, you can actually fit every single other planet at the same time in the space between the earth and the moon, with a bit to spare.

      • Bob Robertson IX
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        333 months ago

        Fun fact, you can actually fit every single other planet at the same time in the space between the earth and the moon, with a bit to spare.

        Though, not for very long. Gravity hates when you try things like this.

      • @[email protected]
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        63 months ago

        Yeah, if you see a real scale moon + earth distance, you wonder why he doesn’t just fly away.

    • @topherclay
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      153 months ago

      I think part of it is that Mt Everest is a lot smaller than you’d think when you’re looking at this scale. The moon is only 2% of the Earths volume so when you spread it over the Earths surface it’s really like a thin thin film to cover the whole surface. But the truth is that all of human experience is an even thinner film smeared across the surface.

      • Gloomy
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        23 months ago

        How is 43 km of moon armor a thin surface by any means?

          • Gloomy
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            3 months ago

            Yeah, but from surface to space it’s ruthly 100 km, so 43 km is quite the cover. Then again, I get what you are saying. I gues it’s a matter of perspective.

          • @[email protected]
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            13 months ago

            Ah I see. Although the comic spreads the moon “relatively”, it presents it absolutely. Although interesting in by itself it does feels it’s missing something.

    • gordon
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      13 months ago

      That’s exactly what I was thinking, how is it possible?