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1. en.wikipedia.org › wiki › Dark_matterDark matter - Wikipedia

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   5 hours ago · The hypothesis of dark matter has an elaborate history. [18] In the appendices of the book Baltimore lectures on molecular dynamics and the wave theory of light where the main text was based on a series of lectures given in 1884, [19] Lord Kelvin discussed the potential number of stars around the Sun from the observed velocity dispersion of the stars near the Sun, assuming that the Sun was 20 ...

2. People also ask

   What is dark matter?

   • Dark matter can refer to any substance which interacts predominantly via gravity with visible matter (e.g., stars and planets). Hence in principle it need not be composed of a new type of fundamental particle but could, at least in part, be made up of standard baryonic matter, such as protons or neutrons.

   Dark matter - Wikipedia

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   Is dark matter science fiction?

   • Dark matter regularly appears as a topic in hybrid periodicals that cover both factual scientific topics and science fiction, and dark matter itself has been referred to as "the stuff of science fiction". Mention of dark matter is made in works of fiction.

   Dark matter - Wikipedia

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   What is hot dark matter?

   • If the dark matter is composed of abundant light particles which remain relativistic until shortly before recombination, then it may be termed "hot". The best candidate for hot dark matter is a neutrino ...

   Dark matter - Wikipedia

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   Does dark matter exist?

   • Although the astrophysics community generally accepts dark matter's existence, a minority of astrophysicists, intrigued by specific observations that are not well-explained by ordinary dark matter, argue for various modifications of the standard laws of general relativity.

   Dark matter - Wikipedia

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