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View Full Version : New Online Classes to Help You Learn More about the Universe



Fraser
2014-Jan-16, 03:50 PM
Roughly eighty percent of all the mass in the Universe is made of dark matter a mysterious invisible substance responsible for the structure of galaxies and the patterns of the cosmos on the very largest scales. But how do we know that? Astronomical images are beautiful, but that’s not their primary purpose from a […]

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