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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.
Alt text:
Astronomers are a little unsure of the applicability of this index, but NASA’s Planetary Protection Officer is all in favor.
I’ve heard that in feet they originally measured it to 29000 exactly. But they added 2 feet so people didn’t think they were estimating the height.