How a medieval Oxford friar used light and color to find out what stars and planets are made of

During the 1240s, Richard Fishacre, a Dominican friar at Oxford University, used his knowledge of light and color to show ...
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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 ...