Space + time = space time? then....

In summary: This means that the light from distant objects is moving away from us faster than the speed of light. This is because the universe is expanding and the space between us and those objects is getting bigger. So the objects appear to be receding from us faster than the speed of light.
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probably a daft question asked before. but. if space is expanding at an accelerating rate would that mean time is accelerating too?
probably a daft question asked before, but.

if space is expanding at an accelerating rate would that mean time is accelerating too?.
after all Einstein* claims and the maths seems to say that space and time are the same thing, ie space-time.
so if space is expanding faster and faster shouldn't that mean time is also?.
and as a result in the past time passed slower?.

would this also mean that the speed of light is only constant relative to the space time its traveling through?.

if this is true would it negate guths inflation model?

if not please feel free to pontificate, postulate and reason ;)

*edit
 
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Time is expanding. We call it the future.
 
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yes its expanding. but at an accelerating rate?.
 
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HEXiT said:
yes its expanding. but at an accelerating rate?.

The expansion of space means that distances between points increases over time. The rate at which this expansion is happening is increasing over time, which we call accelerating expansion. Accelerating time doesn't have any meaning that I can see.
 
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HEXiT said:
so if space is expanding faster and faster shouldn't that mean time is also?

I don't know what this means. I suspect you don't either. Can you describe how such a thing would be measured?
 
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yes but we measure time over a given distance via the speed of light, but that distance is always getting bigger due to expansion.
 
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HEXiT said:
Ernestine
Is that Albert's sister?
HEXiT said:
if space is expanding at an accelerating rate would that mean time is accelerating too?.
No. I'm not sure "time accelerating" really makes sense. The FLRW solution includes the scale factor of space changing as a function of time, but it doesn't affect its notion of time.
 
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HEXiT said:
Summary:: probably a daft question asked before. but. if space is expanding at an accelerating rate would that mean time is accelerating too?

Einstein* claims and the maths seems to say that space and time are the same thing, ie space-time.
so if space is expanding faster and faster shouldn't that mean time is also?.
It may not be immediately obvious from your exposure to relativity, but it is a very geometric theory. Time and space aren’t the same thing, they are different directions in the same space.

The idea that space is expanding means that the universe is shaped like a trumpet. It has a small end and a big end. Saying that the trumpet expands as you go along the trumpet doesn’t mean that the length changes, it just means that the shape is not a cylinder but something more interesting.
 
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If you were to look back in time towards the big bang, wouldn't you measure time dilation?
 
  • #10
Andrew Wright said:
If you were to look back in time towards the big bang, wouldn't you measure time dilation?
Yes, but in cosmology they call it redshift
 

FAQ: Space + time = space time? then....

1. What is space-time?

Space-time is a mathematical concept that combines the three dimensions of space (length, width, and height) with the dimension of time. It is often represented as a four-dimensional continuum, where an object's position is described by its coordinates in both space and time.

2. How did the idea of space-time come about?

The concept of space-time was first introduced by Albert Einstein in his theory of general relativity. He proposed that space and time are not separate entities, but rather are interconnected and can be described as a single entity - space-time.

3. How does space-time affect the behavior of objects?

Space-time is curved by the presence of mass and energy, and this curvature affects the motion of objects in space. The more massive an object is, the greater its effect on space-time and the more it can bend the path of other objects moving through it.

4. Can space-time be warped or manipulated?

According to Einstein's theory of general relativity, space-time can be warped by the presence of mass and energy. This means that gravity, which is caused by the curvature of space-time, can be manipulated by changing the distribution of mass and energy in a particular area.

5. What implications does space-time have for our understanding of the universe?

The concept of space-time has revolutionized our understanding of the universe and has led to many groundbreaking discoveries in physics. It has helped us better understand the behavior of objects in space, the nature of gravity, and the concept of time itself. It has also provided a framework for theories such as the Big Bang and black holes.

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