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Hace 21 horas · History Early history. The hypothesis of dark matter has an elaborate history. 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, Lord Kelvin discussed the potential number of stars around the Sun from the observed velocity dispersion of the stars near the Sun, assuming that ...
Hace 21 horas · Toledo (/ t ə ˈ l iː d oʊ / tə-LEE-doh) is a city in and the county seat of Lucas County, Ohio, United States. At the 2020 census, it had a population of 270,871, making Toledo the fourth-most populous city in Ohio, after Columbus, Cleveland, and Cincinnati.Toledo is the 84th-most populous city in the United States. It is the principal city of the Toledo metropolitan area, which had ...
