Muhammad Al-Hakeem asked:
Is it real that all what we see in the sky happened in the far past, even millions of years, depending on how far the object is? And can the present universe be very different from real?
Is it possible to make a telescope or some sort of radio detector, that can see the real present universe?
Is the rate of the expansion of the universe higher than the speed of light? If so, does this explain why the visible universe is just a portion of the entire universe?
Sorry for the multiple questions. Many thanks.