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Single Idea 21174

[catalogued under 27. Natural Reality / D. Cosmology / 8. Dark Matter]

Full Idea

Whatever dark matter is made of, it must have mass to feel and generate gravity; but no electric charge, so it does not interact with light. The leading candidate has been the weakly interacting massive particle (WIMP), much heavier than a proton.

Gist of Idea

Dark matter must have mass, to produce gravity, and no electric charge, to not reflect light

Source

New Scientist writers (Why the Universe Exists [2017], 08)

A Reaction

Note that it must 'generate' gravity. The idea of a law of gravity which is externally imposed on matter is long dead. Heavy WIMPs have not yet been detected.

Book Reference

New Scientist writers: 'Why the Universe Exists' [John Murray 2017], p.150