Is it possible to have a solid (not moving) reference point in space to determine the movement vector of a object in relation to space? They say everything in space is relative to something else but is it actually possible to create a grid of space which is not in relation to something else but space?
If I had a sensor on a body which detects the amount of time it takes for light to travel in 3 axis with the same distance. The difference in time would create a 3D- vector, would it not? That is relative to space and not to other bodies such as the sun, center of the galaxy or other galaxies. If I travel in a spaceship at 0.5c in the X-axis, but 0 in the Y- and Z-axis and lit a light bulb in the spaceship with a sensor in the X, Y and Z-axis. It would take longer for the light to reach the X sensor. Are these things measurable on earth? How we are actually travelling in relation to space itself.