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![]() ![]() ![]() ![]() ![]() This symmetric cloud, called the Boomerang Nebula, was created by a high-speed wind of gas and dust blowing from an aging central star at speeds of nearly 600,000 kilometers per hour. The rapid expansion has cooled molecules in the nebular gas to about one degree above absolute zero - colder than even the cosmic background radiation - making it the coldest known region in the distant universe. ![]() These interstellar clouds, about 7,000 light years from us, are fittingly called "Mountains of Creation." In this infrared view, you can see newborn stars and clouds of cold gas and dust, sculpted by winds and radiation from a hot, massive star outside the picture, just above and to the right. This massive star is also triggering the formation of the new stars you can see in the picture. ![]() The Trifid Nebula, also known as M20. This nebula is about 3,000 light years from Earth and is visible with good binoculars towards the constellation of Sagittarius ( |
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