Posted AT 11:39 AM EDT on 14/07/08
Fast matters
What is the fastest-moving thing in the universe, other than light or other types of electromagnetic radiation? I've always supposed that it would be the surface of some fast spinning Quasar, but I'm not sure. — Richard, Dayton, Ohio
Pulsars are certainly the fastest spinning star. Some spin so fast that a spot on their equator goes about 50,000 km/s, which is about 20 per cent of light speed.
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