When we say space is expanding...?

What is happening to space. Is it becoming thinner?

The diagram of fabric/membrane which is often used to represent space in documentaries, is it a correct way to visualize the space?How can I visualize space-time in easiest way?

Is it that continuous expansion of space, is decreasing density of space. Will someday our space will develop holes in the fabric due extensive stretching of its boundaries.

If not, is the space continuously supplied to us from somewhere?

When we say space is expanding...?celeb myspace

Simple analogies can clarify what it means for the universe to expand, but they can also be misleading. Space is not literally like a sheet of rubber or fabric, it is simply a good way to visualize it.

The expansion of the universe is much like the inflation of a balloon. The distances to remote galaxies are increasing. Astronomers causally say that distant galaxies are "receding" or "moving away" from us, but the galaxies are not traveling though space away from us. They are not fragments of a Big Bang Bomb. Instead the space between the galaxies and us is expanding. Individual galaxies move around at random within clusters, but the clusters of galaxies are essentially at rest. The term "at rest" can be defined rigorously. The microwave back ground radiation fills the universe and defines a universal reference frame, analogous to the rubber of the balloon, with respect to which motion can be measured.

This balloon analogy should not be stretched too far. From our point of view outside the balloon, the expansion of the curved two-dimensional rubber is possible only because it is embedded in three-dimensional space. Within the third dimension, the balloon has a center, and its surface expands into the surrounding air as it inflates. One might conclude that the expansion of out three-dimensional space requires the presence of a fourth dimension. But in Einstein's general theory of relativity, the foundation of modern cosmology, space is dynamic. It can expand, shrink, and curve without being embedded in a higher-dimensional space.

In this sense, the universe is self-contained. It needs neither a center to expand away from nor empty space on the outside (wherever that is) to expand into. When it expands, it does not claim previously unoccupied space from its surroundings. Some newer theories such as the string theory do postulate extra dimensions, but as out three-dimensional universe expands, it does not need these extra dimensions to spread into.

When we say space is expanding...?myspace quiz myspace.com

space isn't expanding...the stuff in space is expanding out into the nothingness...space itself is the absence of anything, it is empty....the universe, as we understand it, is the stuff in space and does not include anything beyond that....you could detect nothing past the most distant object because nothing is there....there could perhaps be another universe, but it could not be inside of the reality we understand
they say space is expanding when they belive hubble law/red shift is a doppler effect arising from TRANSPORTATION rather than DISPLACEMENT-2 benigns forms of movement
The short answer is that, no, space is not like a membrane that gets thinner as it stretches. What we mean by "expanding space" is that, according the current theory of gravity (known as general relativity) is is possible to construct a space-time coordinate system in which every galaxy is at "rest", meaning that their spatial coordinates don't change, but, over time, the "metric" of the coordinate system, which is a mathematical function used to calculate the distance between two points, does change, such that the calculated distances between galaxies mostly increase. Thus, in any one galaxy's local coordinate system, which will be based on observed distances, most of the other galaxies will be observed to be moving away.
If I had my damn books out of storage I could show you some diagrams . But in simple words space time is expanding along with everything else { by theory } this means that along with material becoming less dense so to speak { less solid mass per cubic light year } we experience time and space along 6 different planes . The words don't really make sense you have to see the math and diagrams to understand it .