A galaxy with a lot of dark matter would have a high mass- to- light ratio compared to the Sun.

Name: A galaxy with a lot of dark matter would have a high mass- to- light ratio compared to the Sun.
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Dark matter does not emit light, so galaxies with a lot of dark matter will have a higher total mass than their visible (luminous) matter. This results in a higher mass-to-light ratio compared to the Sun, which is mostly made up of visible matter.

A Galaxy with a Lot of Dark Matter Would Have