One thing about Hubble which I never quite understood (which by its nature makes it very difficult to describe!) is the “deep field” pic that was taken. If memory serves me right it was focused deep into space and “open” long enough to capture light from the beginning of the universe (13.8 billion years ago) Now, that makes perfect sense to me. But surely, one year, ten years or fifty years later the same action could reveal light from galaxies or other universes from further away so beyond the previous time scale.
Are we assuming that before that period there was nothing or is the only real assumption is that we don’t know because light further away hasn’t reached us yet. Or should that be the light hasn’t reached the the point that Hubble was focused on?
Being pfm maybe a sound analogy would be easier to explain. If we were listening for two gunshots ( assuming the sound waves could travel the distances involved in air) one fired 741 miles away it in theory would be heard one hour after it was fired.
If like Hubble we switched off the mic or stopped listening we wouldn’t be aware of a 2nd shot fired at the same time 1482 miles away that would arrive an hour after that.
So what if there is a gap, a massive gap beyond the limit of the Hubble deep field to a galaxy or sun to which light has to travel before it reaches the previous focal point?
Of course the distances therefor the time is so great they may no longer exist!
My head hurts, I really shouldn’t be on here at this time of the morning
