- #1
Happiness
- 679
- 30
Suppose an object is moving away from you. Is there a way to determine, experimentally or otherwise, whether it is moving through space or whether it is sitting still but appears moving because the space between you and the object is expanding?
Galaxies that are sufficiently far away from us move away faster than the speed of light. If there is no way of distinguishing between the two cases in the above question, then we can equivalently say these galaxies move through space faster than the speed of light, violating special relativity. So there must be a way to distinguish these cases. Is this correct?
Galaxies that are sufficiently far away from us move away faster than the speed of light. If there is no way of distinguishing between the two cases in the above question, then we can equivalently say these galaxies move through space faster than the speed of light, violating special relativity. So there must be a way to distinguish these cases. Is this correct?