[Pazuzu]

It was a Mar's lander.

Everyone in astronomy uses metric. We don't even bother with units, because it's assumed.

Lockheed (I believe it was them) still works internally with Imperial, for some absurd reason. They sent acceleration data to NASA for the probe they built, without units. Each side assumed the other knew what they meant, and the result was a messy busted up field of broken probe parts scattered across the Martian landscape as the thing slammed into the ground at several times it's intended speed.