Frozen water found in a young star system for the first time

15 Puede 2025, 08:15
Illustration of the star HD 181327 and its debris disk.

Earth’s water may be the result of one of the worst known cataclysms. About four billion years ago, Jupiter, Saturn, Uranus, and Neptune changed orbits and triggered a devastating rain of asteroids, comets, and other celestial bodies into the inner solar system, where they crashed into the Moon, Earth, and the rest of the rocky planets. These astronomical bombs — the scars of which are still visible on our Moon — were loaded with ice. Many astronomers believe that much of our planet’s water has this extraterrestrial origin, and that is arrived at the crucial moment for life to emerge for the first time.

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Image of the debris disk of the star HD 181327 taken by the Hubble telescope in 2014.

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