"...using methods that can be replicated anywhere in this Universe."
Well, yeeeeeah... our planet is in this universe, at least it was the last time I checked ;-)
I kinda thought it would be presumptuous to say the constants would work everywhere in the universe. I expected a physics PhD to pop up and yell at us if we said "anywhere in the universe" because, I dunno, at least one of the constants used by the SI base units may not apply or change near black holes or other weird crap out there.
I don't know if people realize how much of a tightrope it is writing for a fair number of readers, most of them experts in a technical field. We try to get everything right within a reasonable time frame.
So anyway, that's why we thought "planet" would be a sensible non-offensive, non-triggering bounding box for boffins, seeing as humans aren't going much further into space for a while.