xkcd #2908: Moon Armor Index ( imgs.xkcd.com )
Alt text:
Astronomers are a little unsure of the applicability of this index, but NASA’s Planetary Protection Officer is all in favor.
![](https://kbin.pithyphrase.net/media/cache/resolve/entry_thumb/65/20/6520ba5e56ef65c4b2d285f5ea308785c8dbcf59be783940335dc00ff463c543.png)
Alt text:
Astronomers are a little unsure of the applicability of this index, but NASA’s Planetary Protection Officer is all in favor.