Thus apparent speeds in excess of the speed of light can be obtained.

/in /by

Thus apparent speeds in excess of the speed of light can be obtained. The apparent speeds only turn out to be much in excess of the speed of light if the actual speed of the radioemitting knots is pretty close to the speed of light. Ejection speeds in astrophysics tend to be close to the escape speed of the object that did the ejecting. What has escape speeds near the speed of light?

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