Dark matter cannot be detected directly through electromagnetic radiation. However, its presence is inferred through various indirect methods:
Gravitational Lensing: The bending of light from distant galaxies by a massive object, such as a galaxy cluster, can indicate the presence of dark matter. Galaxy Rotation Curves: The unexpected constant rotational speeds of stars in the outer regions of galaxies suggest the presence of additional unseen mass. Cosmic Microwave Background (CMB): Observations of the CMB provide evidence of dark matter through its influence on the early universe's density fluctuations.
