Why is the dynamic mass of spiral galaxies an order of magnitude greater than their mass determined by the luminosity of stars?
| September 19, 2020 | Education
The data on the rotation of spiral galaxies indicate that in galaxies, in addition to visible stellar matter, there is matter invisible in any spectral range, the so-called hidden mass. One of the assumptions about the nature of this substance is that it consists of very weakly interacting with ordinary matter of elementary particles: light with a mass of 10-14 – 10-10 proton masses, and heavy, with a mass of 1 – 1000 proton masses.
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