20 Euros Neutron star, Austria

On the coins reverse, the neutron star bulges through a coloured imprint and a stylised representation of its magnetic field.

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Helmut Andexlinger

The words ‘crust’ and ‘core’ are marked in German on the coin’s obverse. ‘Crab pulsar’ is the name of a neutron star that was created from a supernova in the year 1054, while ‘1,4 M ’ refers to the neutron star’s solar mass, ‘30rps’ to its rotation speed per second and ‘r~10km’ to its radius.

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Helmut Andexlinger

Smooth