A group of scientists are studying observable matter in a cluster of galaxies. They conclude that the cluster has only a small percentage of the mass required to keep it from flying apart. Why does the cluster remain intact?(1 point)

Question

A group of scientists are studying observable matter in a cluster of galaxies. They conclude that the cluster has only a small percentage of the mass required to keep it from flying apart. Why does the cluster remain intact?(1 point)
Responses

The orbital speed of the galaxies in the cluster is slow enough to keep the cluster intact.
The orbital speed of the galaxies in the cluster is slow enough to keep the cluster intact.

The orbital speed of the galaxies in the cluster is fast enough to keep the cluster intact.
The orbital speed of the galaxies in the cluster is fast enough to keep the cluster intact.

Dark matter provides the mass and gravity needed to keep the cluster together.
Dark matter provides the mass and gravity needed to keep the cluster together.

Baryonic matter provides the mass and gravity needed to keep the cluster together.

GPT-4o mini · Answer

The correct response is: **Dark matter provides the mass and gravity needed to keep the cluster together.** Dark matter is believed to make up a significant portion of the total mass in the universe and exerts gravitational forces, which help to hold galaxy clusters together despite the observable matter being insufficient for that purpose.