Meanings (ES + gloss)
materia oscura
Matter which cannot be detected by its radiation but whose presence is inferred from gravitational effects.
On large scales like that of clusters of galaxies, gravitational lensing indicates that the dark matter is smoothly distributed, on the average.
The evidence for dark matter in galaxies started to accumulate in the mid-1970s. By the following decade it became clear that essentially all galaxies, including our own Milky Way,…
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