One such galaxy is the beautiful spiral galaxy NGC 5585 in the constellation Ursa Major.

But NGC 5585 appears to hold much more dark matter than other, similarly-sized galaxies.

The galaxy was snapped by the Hubble Telescope, which is a joint mission between NASA and the European Space Agency (ESA).

ESA said: “The many stars and clouds of dust and gas that make up NGC 5585, shown here in this Hubble image, contribute only a small fraction of the total mass of the galaxy.


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