Then there is Quantum Mechanics, do you know that you could have two protons millions of light years apart, but connected (quantum entanglement, or as Einstein quoined it, spooky action at a distance) one connected to the other and immediate reaction/ signals. It violates the fundamental law of nature, right? One should never travel faster than light. But these two particle does, but the action of observing them breaks the link.
Go read up on the
Double Slit Experiment, light acts both as a wave and as particles, depending on if it is observed. This is more of the beauty of physics, and it very well applies to astrophysics, There are many paths I can lead you down
@biometrics you are talking about my special "Interest" as it's called for us Aspies.
And theoretically we can travel forward in time and backward in time, we have the tech right now, the only issue is, we could only go one way. I can go there........
Sorry I blame
@Jings she mentioned me here, that you have an interest in my area of educational love