In astronomy and cosmology, dark matter is matter that neither

送交者: 3747 于 2011-11-02, 14:24:28:

回答: 70%-80% of the total matter is in that vacuum, it is called dark matter 由 silxirt 于 2011-11-02, 14:21:37:

emits nor scatters light or other electromagnetic radiation, and so cannot be directly detected via optical or radio astronomy.[1] Dark matter is believed to constitute 83% of the matter in the universe.[2]
http://en.wikipedia.org/wiki/Dark_matter

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