npub1qn…tsy30 on Nostr: I'm pretty sure the definition of "Class M" would necessitate it being almost the ...

I'm pretty sure the definition of "Class M" would necessitate it being almost the same as Earth, if it's too different then it'd be a different class. Maybe N or L. Or maybe there are subclasses, like M₂ or Mₕ₄ or something. I know they've made mention of planets that "barely qualify as Class M" and even a few that were definitely other classes but were still marginally habitable for humans. Ok, just looked it up, the planet in Voyager's Muse (the Greek Thespian planet) is Class L.