When astronomers search for planets that could host liquid water on their surface, they start by looking at a star's habitable zone. Water is a key ingredient for life, and on a planet too close to ...
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Planets may make their own water as they form — could that mean more habitable worlds in the universe?
Water isn't just delivered to planets by comets and asteroids — it can also be forged as worlds form, a new study finds. For decades, scientists have debated the origin of Earth's water. One ...
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