Question

what is a dark matter?​

Answer 1

Answer:

Dark matter is composed of particles that do not absorb, reflect, or emit light, so they cannot be detected by observing electromagnetic radiation. Hence in principle it need not be composed of a new type of fundamental particle but could, at least in part, be made up of standard baryonic matter, such as protons or neutrons.

Answer 2

Explanation:

Dark matter is a form of matter thought of account for approximately 85 percent of the matter in the universe and about the quarter of its total mass energy density or about2.241!×10 -27 kg/g most darker matter is thought to be non-baryonic in nature it may be composed of some as yet undis-covered subatomic particles