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.

  • teft@lemmy.worldEnglish
    3·
    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.socialEnglish
      1·
      8 months ago

      *imply

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