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Mark Fisher
1999-2008
Orion Molecular Cloud
OMC-1
A vast dark cloud of matter in the constellation of Orion, and in fact invisibly occupying much of that constellation. The Cloud, which is about 1,300 light years from Earth, is the largest such phenomenon known in our Galaxy. Occasionally, local events have rendered some portions of the dark Cloud visible. For example, the formation of the Trapezium system illuminates a region commonly known as the Orion Nebula.
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