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Science glossary film: Dark matter

Dark matter

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Believed to make up most of our Universe, we cannot see dark matter, and nobody knows what it is.

Believed to make up most of our Universe, we cannot see dark matter and nobody knows what it is. Observing how certain things move in space, in particular how spiral galaxies rotate, shows there is more material in galaxies than we can explain. Most physicists believe that we are seeing the gravitational influence of fundamental particles that we have simply not yet discovered because they interact so weakly with normal matter.

Observing how certain things move in space, in particular how spiral galaxies rotate, shows there is more material in galaxies than we can explain. Most physicists believe that we are seeing the gravitational influence of fundamental particles that we have simply not yet discovered because they interact so weakly with normal matter.

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