https://xkcd.com/2908

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

  • @neptune@dmv.social
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    98 months ago

    I mean this does have a practical application, I think. The relative masses of moons to planets does imply the moons ability to sweep junk out of the way before it hits the planet.

    • teft
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      8 months ago

      This is not based on mass but on volume. For example the moon is only 1% of the earth’s mass yet considerably less dense therefore it makes a thicker layer.

      • @neptune@dmv.social
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        18 months ago

        *imply

        Sure. By even the density/mechanical properites of armor will affect its usefulness. Beyond simple thickness.