Navigation for Spaceships Using X-ray Pulsars: Introducing XNAV

This could be the ultimate galactic GPS system: using pulsars as an interstellar navigation tool. Rapidly spinning neutron stars emit focused beams of X-rays into space and many, with accuracy as good as an atomic clock, have been mapped by astronomers. Now these pulsars may have a very important practical use. These interstellar beacons ...

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