The list of exoplanets being discovered just keeps getting longer and longer. As the search progresses and technology improves, smaller-sized rocky worlds like Earth are now starting to be found. This is exciting because it is primarily these planets where extraterrestrial life of some kind could possibly exist. The most ideal planets (as far as we know) are those that orbit their stars in the “habitable zone” where temperatures could allow liquid water to exist on the surface.
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