Universe - Definitions

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Possibly extremely dense neutron stars giving off radiation. Once thought to be the bright centre of other galaxies.


These are neutron stars that emit an enourmous amount of radiation. They spin hundreds of times a second and we pick up the radio waves on Earth.

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Neutron Stars

Formed from very large stars collapsing. Between 10 and 100 km in diameter a they can have a mass many times that of the sun. A star 8 times that of the sun creates a neutron star 1.5 times that of the sun. The rest of the mass is blown into the space.

Black Holes

Black holes that are worth considering are only found at the centre of galaxies. The centre of every galaxy has a black hole. It keeps the galaxy together with its immense gravity and is 10 times denser than what would be expected if ...

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