Dark matter outweighs visible matter in the universe from "summary" of The Fabric of the Cosmos by Brian Greene
In the grand cosmic scheme, the balance between visible matter - the stuff we can see and touch - and dark matter - the enigmatic substance that eludes direct detection - is a crucial factor. While stars, planets, and galaxies make up the visible matter that we interact with on a daily basis, dark matter remains hidden, exerting its gravitational influence on the structures we observe in the cosmos. Despite its elusive nature, dark matter reveals its presence through the gravitational pull it exerts on visible matter. The motions of galaxies within clusters, the rotation curves of galaxies, and the bending of light by massive objects all point to the existence of dark matter. In fact, the gravitational effects of dark matter far outweigh those of visible matter, shaping the large-scale structure of the universe we inhabit. The dominance of dark matter in the cosmic ledger poses a fundamental challenge to our understanding of the cosmos. While visible matter forms the building blocks of stars, planets, and all the f...
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