<p align="right">Last Update: <font color="#4f81bd">July, 22, 2024</font></p> ## BIG IDEAS - Dark Matter is estimated to be 26.8% of the matter in [[The Universe|the universe]]. - Dark matter plays a crucial role in the formation and evolution of structures in the universe. --- Dark matter is a form of matter that does not emit, absorb, or reflect [[Electromagnetic radiation|light]], making it invisible and detectable only through its gravitational effects. ### Astronomical Observations - Galaxy Rotation Curves - Gravitational Lensing - Cosmic Microwave Background (CMB) ### Composition and Nature - Weakly Interacting Massive Particles (WIMPs) - Axions - MACHOs (Massive Compact Halo Objects) ### Role in the Universe - Structure formation - Cosmological Models - Galactic Stability --- Return [[Home|Home]] | [[The Universe]] | [[The Big Bang|The Big Bang Theory]] | [[Solar System]] | [[Galaxies]] | [[Star Clusters]] | [[Superclusters]] | [[Black Holes]]