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📁 黑暗Matter

By observing galactic motions and from cosmology we know that there is a mass in the Universe that we cannot observe so far. It is called dark matter, as opposed to bright stars. It could be some kind of elementary particles.

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Northern Colorado Astronomical Society

http://nocoastro.org/

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Longmont Astronomical Society

http://longmontastro.org/

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Colorado Springs Astronomical Society

http://www.csastro.org/

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Shenandoah Valley Stargazers

http://www.valleystargazers.com/

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Richmond Astronomical Society

http://www.richastro.org/

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Rappahannock Astronomy Club

http://www.raclub.org/

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Northern Virginia Astronomy Club

http://www.novac.com/

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Santa Barbara Astronomical Unit

http://www.sbau.org/

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Sidewalk Astronomers

http://www.sidewalkastronomers.us/

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