I agree. So, if we synchronize the clocks only in one direction and know the function of velocity (then we can calculate the time to reach each point), it works. In other cases, not.

My past can be the future of somebody in the Universe…

Thank you for this approach. It’s very good first to have an intuition and feeling about some phenomena. The logic explanation should come when in your mind the idea already exists and already works with your subconscious and conscious. From my experience it’s the best way of learning. Thanks once more.

I know these axes from Your Daily Equation. It’s a great idea to show physics in this way, especially by adding the natural scale of reality for humans.

I know these axes from Your Daily Equation. It’s a great idea to show physics in this way, especially by adding the natural scale of reality for humans.