Dark Matter May Not Exist: These Physicists Favor of a New Theory of Gravity
Using Newton’s laws of physics, we can model the motions of planets in the Solar System quite accurately.
in the early 1970s, scientists discovered that this didn’t work for disc galaxies –
stars at their outer edges, far from the gravitational force of all the matter at their center – were moving much faster than predicted by Newton’s theory.
physicists proposed that an invisible substance called “dark matter” was providing extra gravitational pull,
Mond’s primary postulate is that when gravity becomes very weak, as it does near the edge of galaxies,
Philosophers of science have argued that this power of prediction makes Mond superior to the standard cosmological model
galaxies have a highly uncertain amount of dark matter that depends on details of how the galaxy formed