In the search for extraterrestrial life, it makes sense to first look for rocky planets with an atmosphere, like Earth. Of the more than 6,300 exoplanets cataloged thus far, the vast majority are not rocky, and only a handful of the rocky worlds appear to have an atmosphere.
In the search for extraterrestrial life, it makes sense to first look for rocky planets with an atmosphere, like Earth.
Of the more than 6,300 exoplanets cataloged thus far, the vast majority are not rocky, and only a handful of the rocky worlds appear to have an atmosphere.
Without an atmosphere, a planet can't have surface water.
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In the search for extraterrestrial life, it makes sense to first look for rocky planets with an atmosphere, like Earth. Of the more than 6,300 exoplanets cataloged thus far, the vast majority are not rocky, and only a handful of the rocky worlds appear to have an atmosphere. Without an atmosphere, a planet can't have surface water.
Without an atmosphere, a planet can't have surface water.
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