Disclaimer - I am not a physicist, nor do I have any deep understanding of space-time, relativity or orbital mechanics. This thread was started simply out of a place of curiosity.
The thought experiment goes like this:
- Since the universe is expanding everywhere at the same time, is it possible to stay completely and relativistically still?
- Since our earth is orbiting around the sun, and the sun is affected by the gravitational effects of the larger galactic arm, and the galaxy has some relativistic vector through the universe, what is the vector of the Earth? More concisely, if we want to ignore direction, at what speed is Earth moving relative to absolute zero?
- Would we observe time dilation of natural physical objects in the universe that are experiencing vast velocities relative to us?
Kind of a mouthful of questions, but I just wonder how physicists take into account these variables when calculating trajectories within our own solar system.