Perhaps not directly related to renewable energy but interesting none the less.
An object emitting a stable radio frequency and appears to be travelling 4 times the speed of light.
Mysterious radio waves emitted from nearby galaxy - space - 14 April 2010 - New Scientist
How the hell can there be an optical illusion of traveling at 4 times the speed of light?
An object emitting a stable radio frequency and appears to be travelling 4 times the speed of light.
Mysterious radio waves emitted from nearby galaxy - space - 14 April 2010 - New Scientist
Yet it does seem to be moving – and fast: its apparent sideways velocity is four times the speed of light. Such apparent "superluminal" motion has been seen before in high-speed jets of material squirted out by some black holes. The stuff in these jets is moving towards us at a slight angle and traveling at a fair fraction of the speed of light, and the effects of relativity produce a kind of optical illusion that makes the motion appear superluminal.
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