See Answer #4 in Post #17. I'll add: Imagine 2 photons, 180 degrees apart on opposite sides of the universe, beaming straight out of the Big Bang. Assume constant light speed (ignore the initial speed surge in the millisecond before light). After 1000 years the distance they have moved is due to light speed PLUS space expansion. Their distance apart is greater than that due to light speed alone (with my caveat written in Answer #4). I KNEW this thread would get transformed into just another transgender thread.
Here's a question that baffles me. Near the time of the big bang, the place in space/time that we occupy was a LOT closer to every other place in space/time. Yet some light takes almost 13.7B years to get to us. If we were much closer 13B years ago, wouldn't the light have long ago hit us and passed us by? Even 6B years ago?
Maybe that light started just a little late, and it's moving on a "treadmill." The distance it has to travel keeps getting further.
I thought that light already has, that's why when we look for the Big Bang we look at microwaves and not light. The light we see now comes from other sources after the Big Bang.
So, as I read it, scientists at NASA are now saying that things from Star Trek and Star Wars may someday possible, and they constructed a digital hybrid between the SS Enterprise and the Millennium Falcon to show how such a craft may look. Nevermind they have no idea on how warp works, or can even be possible given the limitations of the Periodic Table within our own given known elements. This is what 4 years worth of research has yielded. Mmmmkay...
we are seeing the light from the past, how fast a galaxy is currently moving away from us now is of zero importance. logically, a galaxy was not moving faster than the speed of light during the moment the light was emitted, so the light was able to "outrun" the universes expansion and travel towards earth for us all to marvel. basically, the idea is that independent pairs of galaxies are moving at different speeds with respect to each other and the further the galaxies are from each other, the faster they are moving apart. so the furthest light we can see, yes, is not long for this world, but closer light being emitted might still be burning for us to eventually see. i dont know about that. eventually the universe will expand to the point where billions of years from now all light in the night sky will cease to exist except from only the closest galaxies, and eventually even they will appear to burn out. it is going to totally freak out the cavemen.
Well, yeah. But if the place in space we occupy was 1 light year away from a source that's now 13B light years away, the light from that source would have passed us long long long ago.
which im sure it has theoretically, if the universe is infinitely big, then the number of galaxies whose light we will never see again is infinity. times infinity. or else holy shit it would be bright as fuck at night time
hey, im just spitballing here like i said before, logically, any light we are seeing now was coming from something that was not moving faster than the speed of light at the time it was emitted. or maybe its god testing our faith, or a glitch in the matrix, or the oft beguiling enigma of the mysteriosphere
If the space between the two objects expands faster than light, then the light never reaches us. If space expands less than light speed, the light from numerous objects would have long passed us by. But we're seeing them.
its not a single flicker of light though, a sun can burn for billions of years. our own suns light "passed us by" yesterday. yet today, more light. as far as the universe expanding faster than light, anything we can see, is either not expanding away from us faster than the speed of light (yet), or the expansion hasnt caught up with the light (yet). when it does, its gonna be spooky out
Wouldn't we be seeing the same light as when the Big Bang occurred, if that's the case? Or have there been other Big Bangs, throwing out various levels of stars and such? What is the speed of the universes expansion, since the universe is infinite?
All true. But light we're seeing from near 13.7B years ago had to originate at the time of the big bang, about the same time all of everything was REALLY close together.
if whats the case? and like i said, just spitballing here, but its interesting to think about things that dont make sense
