1/8/2023 0 Comments Ford ids cdm 2The primary evidence for dark matter comes from calculations showing that many galaxies would fly apart, that they would not have formed, or that they would not move as they do if they did not contain a large amount of unseen matter. Dark matter is called "dark" because it does not appear to interact with the electromagnetic field, which means it does not absorb, reflect, or emit electromagnetic radiation (like light) and is, therefore, difficult to detect. For this reason, most experts think that dark matter is abundant in the universe and has had a strong influence on its structure and evolution. Various astrophysical observations - including gravitational effects that accepted theories of gravity cannot explain unless more matter is present than can be seen - imply dark matter's presence. Dark matter is a hypothetical form of matter thought to account for approximately 85% of the matter in the universe.
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