NASACXC / GSFC / F.P.GAVRIIL ET AL / SCIENCE PHOTO LIBRARY NASACXC / GSFC / F.P.GAVRIIL ET AL / SCIENCE PHOTO LIBRARY
Kes 75 supernova remnant, X-ray image. In the centre of the remnant is the remains of the star's core, which has formed a pulsar (white dot), or neutron star rotating many times a second and emitting regular pulses of radiation. When a large star dies, gas shells explode outwards and collide with interstellar material. The energy of the collision ionises the gas, causing it to glow. Data from the Advanced CCD Imaging Spectrometer on the Chandra X-ray Observatory.
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