system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How fast would the earth have to be moving through space for us to feel it (if we could feel it at all)?
gpt
All motion is relative. You are currently moving at 99% lightspeed relative to some neutrino that just passed through you, but about 0% lightspeed relative to the earth. The point of relativity is that there is no absolute reference frame from which to determine speed. It doesn't matter how fast you're moving relative to random other objects in the universe (which is exactly the same thing as saying "how fast random objects in the universe are moving relative to you"); you're always at rest in your own reference frame. You can't feel speed any more than you can feel position.