The future

The decades-old search for other worlds like our Earth has been rejuvenated by the intense excitement and interest surrounding the discovery of planets surrounding other stars. However, there are many unanswered questions about the properties of exoplanets, such as details about their composition and the likelihood of their possessing moons. Another question is whether they might support life. Most of the exoplanets discovered so far are too close to their host star and too hot to be habitable: a habitable world is a solid-surfaced planet or moon that can maintain liquid water on its surface. The challenge now is to find terrestrial planets like Earth that are more likely to support life.

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