Exoplanets are about to get their own A-list, a sign that the hunt for alien worlds is entering a new phase of maturity.
On 19 October, the European Space Agency approved the Characterising Exoplanets Satellite, or Cheops, which will stalk known alien worlds for signs of habitability. It represents a shift in exoplanet research, which until now has focused on the hunt itself, namely finding new planets in alien star systems.
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