From a Washington Post story by Michael Cavna headlined “Schulz at 100: How ‘Peanuts’ lifts those on stage, on ice, and in space”:

You can’t keep a good dog down, Charlie Brown.

When NASA launched a mission to the moon last week, the unmanned cabin included a stuffed Snoopy in an orange flight suit. The space beagle was among the small items that serve as “zero gravity indicators,” which visually signal that the capsule has reached “the weightlessness of microgravity.”