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+ - Where Are the Invisible Galaxies?

Submitted by
Charles Betz
Charles Betz writes "Cosmology would predict a myriad of small galaxies made up entirely of dark matter that keep the fabric of space glued together. According to the increasingly refined theory, 85% of the matter in the universe is not the ordinary matter that makes up stars and galaxies, planets and people. Rather, it is elusive dark matter that so far has revealed itself only through its gravity. As the infant universe grew, the dark matter condensed into enormous filaments and clumps, or halos. These weighty objects pulled in hydrogen gas, which formed stars and galaxies. As dark matter cannot be detected by traditional means, the fundamental question to be solved remains: How to spot the invisible?"
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Where Are the Invisible Galaxies?

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