Expansion of space Definition and 71 Threads

[14] arXiv:1103.3688 [pdf, ps, other] Title: The Genesis of the Big-Bang and Inflation Authors: R. K. Thakur Comments: 8 pages Subjects: General Physics (physics.gen-ph) The standard model of cosmology posits that some time in the remote past, labelled as t=0, a...

The standard (popular) explanation about big bang goes like this: "We observe red shift in distant galaxies in all directions. One might think that this means that we are in the center of the universe, where some explosion occured, but there exists a more likely explanation: The universe is an...

I am in a heated debate about the laws of physics with someone who's sole answer to all of my statements has been "because god made it that way". Rather than get into that debate, I was wondering if folks could look over my hypothesis about why the universe is accelerating and point out the...

Hello, I've seen some scientists say on videos and write in books that big bang was the expansion of space itself. Is there actual evidence to support this? That space expands on a large scale after the big bang is ok but to say that the big bang was the expansion of space itself seems a bit...

Are objects in space moving apart at an increasing rate relative to one another, or is the 'space' between them expanding? For example, using red-shift to explain the differential causes: If an object is moving away from Earth, the electromagnetic waves it emits are red-shifted. This would be...

when we observe objects that are billions of lights years away are we also observing the expanse of space as it existed then? let's say 10 billion light years ago. could we call it a compressed universe as opposed to the expanded universe we are in now and observing from the universe would...

What does expansion of space mean? Is there an mathematical and or physics substance to this idea? Or is it just "poof magic happens" that is why the universe is very uniform in density distribution? How does expanding space drag along matter and energy with it? What about conservation of momentum?

I don't really understand how this makes sense. Space, in my mind, cannot be created nor destroyed. It just is there, and always will be there, maybe it can be stretched, but it is there. But apparently space can be created? How is this possible? Space isn't really an object, has no mass...

I was wondering if anyone ever thought about using technology to stop the expansion of space, or at least a section of space. Much like how sections of space-time are warped by large physical objects, perhaps large sections of space-time can be warped to stop expanding (by somehow...

isn`t it a fact that space expands in the absence of gravity? Does that expansion result from the extra dimensions decompactifying into our 3 dimensions in places where there isn`t much gravity (in the space between galaxies)?

Physicists say that space is expanding. Well, Einstein says that space and time can not be separated so I can assume that timespace is expanding. What does it mean for time to expand?

I once learned (way back when) that nothing can move faster than light in a vacuum. But this now seems simplistic. For if there is an object A whose light we see as it was released 13.7 billion years ago and object A is now 45 billion light years away, then that object A has moved further from...

We can measure the expansion of space via the galactic redshifting. Please for now excuse my order of mag. estimate, but in mks units, Hubble's constant is roughly: H=2\times 10^{-18} {\rm m/s/m} If this exapansion was much larger. Say H'=2\times 10^{-10} {\rm m/s/m} Could a...

I read that the expansion of our universe is the expansion of space itself. Apparently, the phrase, expansion of space itself, is meant to characterize the observed displacements of very large scale cosmological structures as an artifact of the isotropic stretching or expanding or some unknown...

Does the expansion of Space require continuous energy?? I'm curious; does the expansion of Space require energy? I'm assuming that the expansion of space must have some kind of 'momentum' (the big bang must have required an input of inertial energy directly into the geometrical expansion of...

Can someone check my math? I want to be sure I understand Hubble’s Law. I know it’s not exact since there’s acceleration, inflation and flatness. But let’s leave all that out just to understand Hubble’s Law. The formulas are pretty simple. There are 2 parts one is for finding the recession...

Could it be that some spaces are expanding more than others? What about the reverse? Could it be that some parts of space are contracting more than others? Is it relative? Could GR support the notion that space where matter exists is shrinking faster than space far away from matter...

My apologies if this is too simplistic or poorly phrased of a question. I am trying to get a better handle on what the observed expansion of space implies about the nature of space itself. My basic question is: What are the mainstream theories and descriptions that cosmologists and...

Does anyone know the current theory for the expansion of space? I was thinking about this the other day. Do scientists think the universe is expanding as in extending in size? Because if it's expanding, won't everything expand with it? Including us.

how can the area or distance between two objects getting larger cause something traveling between them to strech?

Which of these comes closest to how you picture the expansion of space? As an explosion from a central point with galaxies flying away from the center of the explosion? As the 3D analog of the surface of a balloon? As the 3D analog of an infinite flat sheet of graph paper on which the...