Question

What is the evidence that a large proportion of the mass of the universe is in the form of dark matter? fast In 1933 astronomers noticed that galaxies at the edge of the Coma cluster of galaxies were moving much too the cluster to remain in the cluster, given the amount of mass that was observable in slow not observable observable 10 90 50 This led to the suggestion that some "dark" matter that was the 1970s many observations have confirmed that the motion of galaxies and stars cannot be explained by the gravity exerted simply by the usual matter. lay hidden in the cluster. In In fact, the observable matter constitutes only about explain the motion we observe in the universe. Thus, dark matter is conjectured to account for the missing % of the matter necessary to % of matter that is needed to explain the motion of galaxies and stars.

Answer 1

moving too fast to remain

matter that was not observable lay hidden

only about 10% of the matter

for the missing 90% of the matter.