NASA finds 2 stars that orbit each other every 38 minutes
Scientists with NASA's NICER mission have discovered two stars that revolve around each other every 38 minutes, the shortest-known orbital period for a X-ray pulsar binary system. A pulsar is a rapidly spinning neutron star, formed when a star more massive than the Sun explodes into a supernova while its core collapses into a superdense city-sized body.