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Rate of Earth-sized habitable zone planets
The definition of Earth-like needs some examination, of course. Currently Venus would count as an Earth-like planet, and so would Mars; neither are hospitable to humans.

Despite the discovery of thousands of exoplanets, few or none appear to be as Earthlike as the planets described in Big Ideas, Grand Visions, although that is probably a selection effect. We really haven't found a Nova Terra, or Pacifica, or Penglai yet. Many of the worlds we've found are too big - the planets described as 'habitable' are generally twice as massive as Earth, and if they have water oceans these are probably too deep to form Earth-like oceans and continents. Or they are orbiting red dwarf stars and are tidally-locked. I'm still looking for a good Earth-clone.

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RE: Rate of Earth-sized habitable zone planets - by stevebowers - 09-15-2022, 05:33 PM

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