Dark matter is a mysterious substance that makes up about 27% of the universe. Unlike ordinary matter, which includes stars, planets, and galaxies, dark matter does not emit, absorb, or reflect light, making it invisible and detectable only through its gravitational effects. Scientists infer its presence by observing how galaxies rotate and how they interact with each other. Despite extensive research, the exact nature of dark matter remains unknown. Various theories suggest it could be composed of WIMPs (Weakly Interacting Massive Particles) or axions, but no direct evidence has yet been found. Understanding dark matter is crucial for explaining the structure and evolution of the universe.