Dead star still shines

''The glowing Crab Nebula, a spectacular and colorful object famously imaged by the Hubble Space Telescope, represents the leftovers from a supernova explosion observed by Chinese and Arab astronomers in 1054 C.E. The star that exploded is still there, but now in the form of a dense, spinning pulsar that emits lighthouse beams of radiation.

Now scientists have discovered high-energy gamma rays near the pulsar that oscillate in alignment with the star's spin.''



Article here.