NASA's Spitzer Space Telescope observed a fledgling solar system, and discovered deep within it enough water vapor to fill the oceans on Earth five times. This water vapor starts out in the form of ice that surrounds the embryonic star. The ice then smacks down onto a dusty pre-planetary disk circling the stellar embryo (doughnut-shaped cloud) and vaporizes. Eventually, this water might make its way into developing planets.
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