Currently, most of the mass of the matter of the universe is believed to consist of:
A)baryonic matter, made up of protons and neutrons.
B)tachyonic matter, travelling only faster than the speed of light.
C)dark matter not made of protons and neutrons.
D)dark energy.
E)tiny but very numerous black holes.

Question

Quizplus · Accepted Answer

Observations of the rotation of galaxies and the distribution of matter in the universe suggest that there is more matter than what can be accounted for by baryonic matter (A). Therefore, scientists propose the existence of dark matter (C), which does not interact with light and is not made up of protons and neutrons. Tachyonic matter (B) is hypothetical and not supported by current scientific evidence. Dark energy (D) is a different component of the universe that is believed to be causing the accelerating expansion of the universe. Tiny black holes (E) may exist, but they would not account for the majority of the mass of the universe. Observations of the universe suggest that the majority of the mass in the universe is not made up of the baryonic matter that makes up atoms, but rather a form of matter that does not interact with light, known as dark matter.

Currently, Most of the Mass of the Matter of the Universe