NASA / ESA / STSCI / SCIENCE PHOTO LIBRARY NASA / ESA / STSCI / SCIENCE PHOTO LIBRARY
Crab nebula (M1), X-ray image. This nebula is the remnant of a supernova that lies 6,500 light-years from Earth. At its centre is the remains of the star's core, which has formed a pulsar, or neutron star, that rotates 30 times a seconds and emits regular pulses of radiation. The nebula's shape is caused by a complex interplay of the pulsar, a fast-moving wind of particles coming from the pulsar, and material originally ejected by the supernova explosion and by the star itself before the explosion. Image obtained by the Chandra X-ray Observatory in November 2012.
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