Researchers have discovered an unusual pulsar – one of deep space’s magnetized spinning neutron-star ‘lighthouses’ that emits highly focused radio waves from its magnetic poles. It is unusual because the masses of its two neutron stars are quite different — with one far larger than the other. The breakthrough provides clues about unsolved mysteries in astrophysics — including the expansion rate of the Universe (the Hubble constant).
The newly discovered pulsar (known as PSR J1913+1102) is part of a binary system — which means that it is locked in a fiercely tight orbit with another neutron star.
Neutron stars are the dead stellar remnants of a supernova...
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