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The Sciences

The Biggest Chill

By Corey S PowellMay 1, 2003 5:00 AM
Nebula.jpg
T. Sahai and J. Trauger/SPL/NASA

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This Boomerang nebula is the coldest known spot in the universe. A dying star at the center expels gas at 100 miles per second, forcing the nebula to expand rapidly and to cool to 2 degrees Fahrenheit above absolute zero. This image from the Hubble Space Telescope reveals enigmatic banded structures in the exceptionally dense outflow from the star.

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