What is the history of dark matter in the universe?

What is the history of dark matter in the universe?

Dark matter was first proposed in the 1930s to explain discrepancies in galaxy rotation curves. It has since become a crucial part of cosmology.

How do scientists know dark matter exists if we can't see it?

Scientists infer dark matter's existence through its gravitational effects on visible matter, radiation, and the large-scale structure of the universe.

What are some theories about what dark matter actually is?

There are several theories, including WIMPs (Weakly Interacting Massive Particles), axions, and modifications to gravity, but none have been confirmed yet.

How does dark matter affect the formation of galaxies?

Dark matter acts as a scaffold for galaxies, providing the necessary gravitational pull for gas and dust to coalesce and form stars.

What are the current experiments trying to detect dark matter?

Current experiments include direct detection methods like the LUX-ZEPLIN experiment and indirect detection through observatories like the Fermi Gamma-ray Space Telescope.