4 ms·
This is not FTL in any real sense. The apparent motion of distant galaxies is just that - an appearance only. In our frame of reference, they appear to be rece
by mentalpiracy 3y ago
This is not FTL in any real sense.
The apparent motion of distant galaxies is just that - an appearance only. In our frame of reference, they appear to be receding faster than light, but in their own frames of reference, these galaxies themselves are not actually moving any faster than our own galaxy does.[0]
Imagine you shine a laser pointer at the moon and are still able to see the dot. With a flick of your wrist, you move the dot from one side of the moon to the opposite side. If you did this quickly enough, the dot could appear to have moved ftl - but in reality, there was no superluminal acceleration.
[0] galaxies are obviously still interacting and moving relative to local neighbors