Hi!
Consider a high-speed camera set up to record an explosion and the resulting shockwave emanating from the explosion. In the same frame you can see the shock wave as well as people in the distance. Is it true that the people in the distance wouldn't hear the sound of the explosion until...
Ok, I think space and space-time is what I'm getting confused. If the orbit of all the planets in our solar system around pluto are at about the same angle, what would happen if we sent a spacecraft 90 degrees from where we usually send it? Like in...
I'm reading Parallel Worlds by Michio Kaku and I keep wondering if space is flat, then what would happen if you kept moving directly downward under our solar system (or directly down from any other planet)? What would you see and where would space end or simply curve back around. Thanks!