Can Universe Be Decelerating in Time?

In summary, the question asks if it is possible for the entire universe to be slowing down in time. This idea is based on the observation that objects further away appear to be accelerating away faster. However, the concept of the "arrow of time" as a measure of velocity does not make sense. Additionally, there is no center of the big bang and the idea of the universe exploding is also a misconception. It is recommended to seek clarification and further understanding through forums and discussions.
  • #1
VarnaiKristof
2
0
TL;DR Summary
Since the universe exploded (big bang) the velocity of objects in it changed, could the same be true for our arrow in time (relativity aside).
Is it theoretically possible that the whole universe is decelerating in time?

My question originates from the discovery, that objects further away accelerates away faster.
Is that acceleration measured from us or from the center of the big bang?
 
Physics news on Phys.org
  • #2
VarnaiKristof said:
Is it theoretically possible that the whole universe is decelerating in time?
Please define what you mean by this.
 
  • #3
VarnaiKristof said:
Summary:: Since the universe exploded (big bang) the velocity of objects in it changed
Is that so? What's our velocity now then, and what was it earlier?

could the same be true for our arrow in time (relativity aside).
The arrow of time is a binary thing. This way is the future, the other way being the past. There's no magnitude to it.

Is it theoretically possible that the whole universe is decelerating in time?
You seem to be referring to the rate at which time flows, in which case I'd again ask you what rate it runs now, and what rate it ran earlier? It makes no more sense than saying a meter is a different size at this end of the field than at the other end.

My question originates from the discovery, that objects further away accelerates away faster.
They don't. The rate of expansion is not a speed or velocity. Different units (1/sec), vs m/sec.
 
  • Like
Likes etotheipi and Dale
  • #4
VarnaiKristof said:
Since the universe exploded

It did not explode.

VarnaiKristof said:
the center of the big bang

There is no such thing. You have quite a lot of misconceptions to clear up :smile: Please use our "search" option to find some topics about Big Bang, where most of this misconceptions were discussed.
 
  • Like
Likes Orodruin
  • #5
Thank you for the quick answers. It is quite tricky to understand these concepts, not alone knowing some parts were explained to me incorrectly. I will look into the forums.
 

Related to Can Universe Be Decelerating in Time?

1. Is it possible for the universe to be decelerating in time?

Yes, it is possible for the universe to be decelerating in time. This theory is known as the "Big Crunch" and suggests that the expansion of the universe will eventually slow down and reverse, causing everything to collapse back into a singularity.

2. What evidence supports the idea of a decelerating universe?

One piece of evidence is the observation of distant supernovae, which have shown that the expansion of the universe is accelerating. This suggests that the universe is currently experiencing a period of accelerated expansion, but it is still possible that this expansion could eventually slow down and reverse.

3. How does the concept of dark energy affect the idea of a decelerating universe?

Dark energy is a mysterious force that is thought to be responsible for the accelerating expansion of the universe. If this force does indeed exist, it would make it less likely that the universe will eventually decelerate and collapse back into a singularity. However, the exact nature and properties of dark energy are still not fully understood.

4. Could a decelerating universe lead to a "Big Bounce" instead of a "Big Crunch"?

There are some theories that suggest a decelerating universe could eventually lead to a "Big Bounce," where the universe collapses and then expands again in a never-ending cycle. However, this is still a highly debated and speculative idea, and there is currently no strong evidence to support it.

5. How does the concept of dark matter relate to the idea of a decelerating universe?

Dark matter is a type of matter that is thought to make up a large portion of the universe, but it cannot be directly observed. Some theories suggest that the gravitational pull of dark matter could eventually slow down the expansion of the universe and contribute to a decelerating universe. However, more research is needed to fully understand the role of dark matter in the evolution of the universe.

Similar threads

I Time dilation from galactic gravitational mass
    • Special and General Relativity
2
Replies
49
Views
4K
I What Happens When an Object Accelerating Away from a Black Hole Stops?
    • Special and General Relativity
2
Replies
35
Views
2K
B The expansion of the Universe and time travel (By a non-scientist)
    • Special and General Relativity
Replies
2
Views
1K
I Bell's spaceship paradox unknown? Interpretation?
    • Special and General Relativity
Replies
20
Views
702
B A Scenic Trip as a Spaceship at 0.999...c, and questions that arise
    • Special and General Relativity
2
Replies
36
Views
2K
B Trying to understand what "time" is (layperson)
    • Special and General Relativity
Replies
21
Views
1K
Is there really nothing faster than light?
    • Special and General Relativity
2
Replies
40
Views
3K
B Thought Experiment : Try and get Alice to "0%" the Speed of light
    • Special and General Relativity
Replies
15
Views
1K
B Is A Universe w/o Mass Possible? Exploring Time & Matter
    • Special and General Relativity
Replies
25
Views
3K
Accelerating or Decelerating Universe Expansion?
    • Special and General Relativity
Replies
5
Views
1K

Hot Threads

Recent Insights

Back
Top