A new study uncovers the reason why Andromeda is speeding toward the Milky Way, revealing the powerful influence of dark matter on galactic movement.
For years, astronomers have observed the strange motion of Andromeda, the Milky Way’s closest large galactic neighbor. While most galaxies in the universe are receding due to the expansion of space, Andromeda has been accelerating toward our galaxy a... [4347 chars]