What if the universe is a blackhole.

[smartie]

I'm doing a thought experiment for myself and was wondering if any clever educated people could give me a hand.<br /><br />Suppose I fell into a blackhole the size of a galaxy, so that the gravitational stresses are reduced on me and it takes me many years to fall towards the central singularity. I may not even be aware I'd crossed the event horizon as I freefall towards the centre. What I'd like to know is what effect it would cause to the<font color="black"> images </font>f far away Galaxies and Quasars as to there physical size, time dilation, red shift effects, gravitational lensing etc. Don't forget I'd be experiencing lorenz contraction so I'd effectively be shrinking. What do I see?

 

[yanks1419]

I think you would just see streaks of light all over the place. That or maybe you would just blackout since you are going to fast. but dont take my theory into consideration because i am not that smart to begin with.

 

[bonzelite]

what you see depends on what you believe about such a theoretically constructed object. <br /><br />we just had a big thread on this subject. the event horizon coordinate moment of infalling and the singularity are two sides of the same sheet of paper. you will, in essence, never quite reach the singularity as you will never quite fall into the "hole." you are falling in infinite coordinate time in the discreet moment of spacetime losing all dimensional qualities of itself. <br /><br />the schwartzchild radius is proportional to mass, yet this mass, once at the horizon, folds over upon itself, asymptotically before ever "reaching" the horizon, as spacetime loses all curvature. in essence, it is "really" already at the "outside of" the singularity, as this condition will be experienced regardless of what point you "enter" along the SR circumference. there is, then, no "behind" the event horizon. once at this coordinate time, you can forget all about physical laws. those are no longer applicable. <br /><br />you would see --if you could in theory only-- the surrounding cosmos reflected infinitely, enveloping your entire field of view no matter where you looked. the only relatable analogue would be as you may see yourself reflected in mirrors in public restrooms again and again and again, on to infinity. but you would not be yourself as every coordinate/location of the matter comprising your body must enter the event horizon singularly, all at the same time. <br /><br />how would you look, then? who knows!

 

[newtonian]

smartie - This will be overly simple and likely wrong - but a start for me:<br /><br />Assume we are in a protective capsule, perhaps with a dark energy protective force field, so we can survive or the question is pure science fiction.<br /><br />Then assume we are approaching the center mass of the black hole slower than light speed - or else we will outrun tbe photon we wish to observe or "see."<br /><br />In that case we will observe the portion of universe that has a relative recession speed from our point of reference that is less than light speed.<br /><br />Research light cones and visibility horizons.<br /><br />NOte: if dark energy can travel faster than light and we can create a dark energy telescope then we can observe dark energy sources beyond the above limit.

 

[bonzelite]

by the way this thread belongs in the phenomena forums.