" Theoretically, and I'm not sure I quite agree, an observer moving at 0.99999999……9999999 the speed of light is justified in considering himself stationary with all the rest of the Universe rushing past him." Dale}
(I don't know how to use the quote function).
Right, who would agree?
Suppose we put a guy on a ship loaded with fuel and accelerate him constantly for months on end, until he reaches .9999c. All that him he is seeing the earth recede into the distance as he accelerates. Then, finally, he stops accelerating, but keeps moving away from the earth at great speed.
What fool would then say that the earth moving away from him while he remains motionless?