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proxima
Because โEarth-likeโ doesnโt necessarily mean โlike ourย Earth.โ
So the punch line is that Proxima b can retain liquid water on its surface for a wide range of conditionsโbut only if it held on to some water while its star went through its youthful tantrums. Another potential obstacle to habitability is the amount of energetic radiation Proxima b receives compared to Earth: 250 times more X-rays and 30 times more extreme ultraviolet light. What this means for the planetโs atmosphere is unclear, but itโs probably not a deal-breaker for life.
This is the planet we have been waiting for.