Quote:
Originally Posted by Sephiroth
Then how do you explain galaxies that we cannot see because they are receding from us at faster than the speed of light? Yet galaxies closer to the one in question can see the receding galaxy?
The "maths presumably" suddenly becomes "truth", but always without anyone knowing what the coefficient K is.
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Because the galaxy’s absolute velocity is not greater than the speed of light. The distance between that galaxy and us may be increasing at greater than the speed of light because we are moving away from the galaxy at speed, just as it it’s moving away from us. But neither object is moving at greater than light-speed if observed from a fixed point.
There is a concept called the ‘future light cone’ - the region of spacetime within which nothing is moving at greater than light-speed
relative to us. Anything light-emitting within this region can be observed by us. But anything whose speed
relative to us exceeeds light-speed, was never within our future light cone, and never will be.