【　Happy #NationalLighthouseDay!

"Cosmic" lighthouses, known as pulsars, are rapidly spinning neutron stars that emit X-ray photons in beams that sweep the sky. From far away they appear to pulse! This Hubble visible-light view shows the Crab Nebula pulsar: https://go.nasa.gov/3Yier5m 】
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https://twitter.com/nasahubble/status/1688550595689435136?s=12&t=gRwDVaatTrdezkSC9YCthg