I don't think I quite understood what you meant to say at the end there...
So, I'll give you my Space-Time conception. First, the quick answer, the universe we exist in is composed of 4 spatial dimensions (there are more,
but we need only concern ourselves with 4).
To extend and expand on that, we first need to take a step backwards to the 2nd dimension.
Welcome to Flatland!
You are a flatlander - you have width, and length, but absolutely no height. Midway through last millenium, your civilization realized that you're
not living on a 1-d straight line, but rather on a single, immense circle - a thing of 2 dimensions like yourself.
If you look into the great unknown that is the universe, you see it as being 2-dimensional, but without edges. It seems to go on forever in all
directions, all 4 of them.
Unbeknownst to you though, the universe, and even the circle you live on, curve and bend into a THIRD DIMENSION! Your circle doesn't bend in upon
itself to form a sphere, but is rather a kind of dimple into 3-dimensions.
Now, from your perspective (seeing as how light isn't travelling "up" but will just continue going along the 2-d universe), you can't detect, nor
even imagine, this mystical 3rd dimension - but it has astounding implications on your world!
In fact, your universe curves so much it actually goes into a sphere. If you were to mark an immovable point in your universe, and travelled in a
perfectly straight line, you would somehow - quite to your surprise - end up exactly where you started. It seems impossible, because you never turned,
never deviated from your course, never passed by a familiar constellation, and yet here you are.
Now, take this realm, and put everything 1 dimension higher.
We are 3-d - we live in a universe with height, width, and length. But there is a 4th dimension, one which we experience every day, which we are
completely at the mercy of and cannot affect... Time. Time is the 4th dimension, that line at a right angle to everything else.
Let's return to our comfortable 2-d flatland though, since it's easier to conceptualize.
If Flatland curves into the 3rd dimension, what happens? Let's say that a downward force like gravity still exists in Flatland (we'll return to this
concept, and how it's wrong, in a bit - but for now it's useful to explain things) that keeps you pinned to the 2-d surface. If something of mass
comes along, it bends this 2-d surface into the 3rd dimension.
Like a bowling ball on a mattress, everything around it now falls towards it. These things aren't "attracted" to the bowling ball, it's just that
their paths are warped by the ball's presence.
Also, if we imagine the 3-dimensional curved Flatland Universe as a Balloon, the distance between two points on an expanding balloon could move away
from each other faster than the speed of light - and no one at either point would realize that they're moving. Like the universe we live in, there's
no center to the universe on this 2-d plane - one has to go inside the balloon - move 3-dimensionally - to get to the center.
For our universe the same thing applies. Matter warps space-time. If you imagine a 3-dimensional grid, a planet moving through it will bend the
grid-lines in towards the center of mass.
The important thing to remember about all this though is that anything passing through this distorted space isn't ATTRACTED to anything else. It's
not a downward force like in our 2-d example. Rather, it's that space itself is bent. The path an object is taking is changed.
So, if I could measure only speed, and not direction, if I passed by Jupiter and had my course changed, I would never detect it. My apparent speed has
remained exactly the same - however my direction (and perhaps my observed speed) could have changed.
If you take a piece of paper, and draw a line on it, then bend the paper, the line, from directly above (looking at the line as if it were 2-d and not
bent into the 3rd dimension) would curve around the curve you made. The space hasn't changed, the line hasn't changed, but the path it has taken has
It is in this way that Light is also affected by gravity. It's not affected by mass - since light has none - but rather, the space it travels along
is bent, and so this line of light curves.
Now the main question concerning physists is "why does space-time curve?". It's right up there with "why do opposite charges attract?". Think
about it, there's no particle that travels between two magnetically attracted particles. The information is sent via the quantum level. I don't
believe we'll find "the graviton". I don't believe it exists. I believe that information on gravity travels at instantaneous speed, that it breaks
the light barrier by never existing on it or through it in the first place. Why do I believe this? Because it's the only way our observations make
sense. If information on gravity travelled as slow as the speed of light, then galaxies hitting each other wouldn't have stars that would know about
it for tens of thousands of years.
Then again, I got a lot of personal theories, but since I'm just a Rogue Scholar, and not an actual physicist, I'm not often paid attention to