Dark matter, which constitutes the majority of a galaxy’s mass, influences its motion and structure through gravity. Unlike normal matter, dark matter does not emit or absorb light, making it invisible to telescopes. However, its presence can be inferred from its gravitational effects on visible matter, such as stars and gas. Dark matter acts as a gravitational scaffold, binding galaxies together and shaping their distribution and motion within cosmic structures such as galaxy clusters.
Come for the Scenery, Stay for the Stars