Video that made me make this post:
Spoiler (show)
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Hubble space telescope saw galaxies which are of less than 10% of the universe's age in 'deep space'.
That is, at a very far away distance, the Hubble space telescope could see Galaxies from past.
If you don't know it already, You do not see/hear/feel anything from the present. It's always from the past. Light has a finite speed and nothing we know is faster than light. So the time it takes to reach you is finite. So for objects which are incredibly far away from you, you can't see them at their present state, you always see their past. Actually, you don't even look at Sun in its present state, you always look at an 8 minutes past version of the Sun and it's the closest star to us! As your distance from stars increases, the more time it takes for light from them to reach you
in short, the farther you look, the more back in time you see!
Limits of our universe
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Now, what this made me think is: If Hubble telescope saw some old galaxies in some part of the universe, What about
other parts?! I mean, if the Universe originated from the Big Bang, that means, if we're seeing old galaxies, they
should be 'inwards' this expanding universe.
Then what is 'outwards'? It is possible, that if they turn the telescope to other direction, They'd see
that 'void' outside our universe.. or the place where stars expanding from the universe haven't reached
yet, or they HAVE reached there, but since we're seeing the 'past' of that region, we're seeing
nothing.
But, I have never heard of any telescope seeing the void ._.
If anyone knows anything about this, please share with us.
Outside our Universe?
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But what I discussed just now, was assuming that the density of time-space is uniform throughout the universe we live
in, and it's so because as the video said, it might be a part of a greater time-space void.
.
But is it really so? I've never heard that theory before watching this video.
.
What I had heard before was that 'the density of time and space is not the same', that 'our universe is
the only one whose time and space we live in', that there was nothing 'before' big bang, and nothing
'outside' the universe, that 'time-space being our universe itself, that the terms 'before' and
'outside' lose their meaning in context of origin of universe and limits of universe'
^ and those things are damn confusing, if time is not the same everywhere, space is not the same everywhere, what the
hell do we compare with >.<"
So which one do you think is more correct? Or do you know something about it?
Silly rant about dimensions and black holes
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And now, something totally stupid; I'll share with you an idea of mine:
travelling near light speeds makes time fast for you. I thought that i's just like how a looong line in one
dimension in space can just appear as a small dot in another space dimension (the entire infinite y axis in 2-D space is
just one point, x=0 on x axis) you just have to move sideways (from the infinite y-axis to the x-axis)
in case of time, long time appears as short time, you just have to travel fast. That means, there's some similarity
in those space dimensions and time dimension
In space, it was because of hopping from one dimension to another (from y to x)
And we observe, a very similar phenomenon in case of time where time appears to become short at higher speeds, so is it
possible that time has multiple dimensions too? and moving faster is like changing from one dimension to another? Well,
I know it's not a very original idea, I mean there's a whole article on it on wikipedia: http://en.wikipedia.org/wiki/Multiple_time_dimensions
and many many stories have that concept
But you see.. honestly speaking, I didn't get one word of what was written in there -.-'
isn't there an easier way to explain it? -.-'
oh and i just had a cursory glance at the second question posed here: http://math.ucr.edu/home/baez/physics/Relativity/BlackHoles/fall_in.html
when you enter a black hole's event horizon, for normal time dimension, it seems infinite time for you to reach
there. But for the thing that's fallen in, it has a finite time and is actually a different co-ordinate, just how
the origin of x-axis is a finite point, but for someone on y co-ordinate, it seems like and infinite line.
Now consider this: if time is said to have 'started' before the big bang and didn't exist before it, then
it's like the origin of a new co-ordinate, isn't it? And then we just saw that black holes have a different
co-ordinate of their own. Doesn't it seems similar? Is a black hole somehow linked to an event horizon? Is a black
hole, a birthplace for a universe? Just that the universe is in a totally different dimension.. has our universe
originated from a black hole too? But maybe only some humongous black holes could've made our universe, i guess,
cuz to create so much mass it should have absorbed so much mass from some other universe, and then sent it here.. maybe
black holes are just pathways between universes? There are so many mysterious possibilities in space out there.
So share your own thoughts and opinions or even silly-ideas like i did here. Thanks for reading :)
(and sorry for typos if any. If you didn't get any part of this because of my somewhat poor english and a very poor
ability to explain things, please let me know, I'll try to tell it in a better way)
