“Sorry, I did not mean it in that way. I talking more about traveling long distances. Cosmic strings might work for that.”
Yes, but cosmic strings evolve and eventually decay due to the radiation and energy they give off. How would you get two cosmic strings together or at least close enough to a black hole to do this? Then you would have to find some way for your time machine to loop around the cosmic string, as well as well the necessary mass energy too travel further back in time. :(
“I think Stephen Hawking explained it best when he said that time travel is not possible because nobody from the future has visited us yet.”
But I always brought up to believe that a time machine cannot go back further than the point where the time machine was created. :(
For example, traveling back further back in time we would open ourselves to many different paradoxes. What would happen if I traveled back in time to killed my father, heaven forbid? Can I travel back further in time then when I was born? Would I cease to exist? Of course I could be wrong. Maybe the reason for this is because our events done in the past from the future could open us to the possibility of parallel or alternate universes, which might explain why no one has contacted us from the future. Time no longer follows a straight line but branches off into many different universes.
“So, we cannot see the black holes themselves, but since the pull of it’s gravity is so strong, we can see the energy pooling up ready to be sucked in?”
Correct! Look at it this way, Sir Yanny, before matter passes into a black hole, it is crushed by the strong gravitational field, which causes the matter to emit radiation that escapes prior to the destruction of matter.
“maybe consider them to be like magnetic fields (VERY crude analogy). a body/solution/molecule subject to a magnetic field (for example, in an MRI/NMR (nuclear resonance imaging) machine will become excited. This excitement has a signiture (likely multiple signitures) that may register in different ways. One of these might well be captured by: infra-red/spin-spin coupling/ etc. (i.e. something that does not get sucked into the black hole).
i hope this is a little clear - sorry, i’m no astrophysicist, however i do find imaging fascinating.”
I find you fascinating! ^_~ It is not everyday that I get to meet someone with such a great understand of both medicine and cosmology :D