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Bookmark or Share- Dark matter | Definition, Discovery, Distribution, & Facts - Britannicadark matter, a component of the universe whose presence is discerned from its gravitational attraction rather than its luminosity. Dark matter makes up 30.1 percent of the matter-energy composition of the universe; the rest is dark energy (69.4 percent) and “ordinary” visible matter (0.5 percent).
- Dark matter - WikipediaIn astronomy, dark matter is an invisible and hypothetical form of matter that does not interact with light or other electromagnetic radiation. Dark matter is implied by gravitational effects which cannot be explained by general relativity unless more matter is present than can be observed.
- What Is Dark Matter? | NASA Space Place – NASA Science for KidsDark matter is that invisible glue that keeps stars, dust, and gas together in a galaxy. This mysterious substance makes up the majority of a galaxy's mass and forms the foundation of our Universe's structure.
- Dark Energy and Dark Matter | Center for Astrophysics | Harvard ...Dark matter makes up most of the mass of galaxies and galaxy clusters, and is responsible for the way galaxies are organized on grand scales. Dark energy, meanwhile, is the name we give the mysterious influence driving the accelerated expansion of the universe.
- If dark matter is 'invisible,' how do we know it exists?Put simply, to detect dark matter, astronomers look at its indirect effects on gravity and how it impacts other objects with mass and light.
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