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...cosmological calculations (like those concerning the relationship between dark matter and ordinary, visible matter) could be compared with data from real measure ::<math> \Omega_{M} = {matter\,\,density}</math> (includes regular and dark matter)

2. The 4% Universe: Dark Matter, Dark Energy, and the Race to Discover the Rest of Reality

...ion times denser than water, which is about 2 septillion times denser than dark matter in our galaxy. (100 trillion is 1 followed by 14 zeroes. 2 septillion is 2 | [[Dark matter]], average for universe

* [[Dark matter]]

...here]] as well as [[cosmic rays]], [[cosmic dust]], [[anti-matter]], and [[dark matter]] in the Universe.<ref name="NASA Fields of Research" />