Question: time relative to the position in the universe?

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Discussion Overview

The discussion revolves around the concept of time as it relates to gravity and location in the universe, particularly in hypothetical scenarios involving two identical Earths positioned at different locations and the effects of proximity to a black hole. The scope includes theoretical considerations of time dilation and gravitational effects.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant suggests that time would be the same on two Earths of equal mass and gravity, regardless of their location in the universe.
  • Another participant challenges the idea of a "center" of the universe, stating that the Big Bang occurred everywhere and that time dilation would not be experienced if the two Earths were at rest with respect to one another.
  • A participant proposes that being near a black hole would cause time to slow down significantly for an observer compared to an outside observer, depending on proximity to the event horizon.
  • There is a discussion about the nature of time at the event horizon of a black hole, with one participant questioning whether time would stop altogether and another clarifying that this is only from an outside perspective.
  • One participant mentions that if viewed from an equidistant point, both Earths would experience equal gravitational time dilation relative to an observer.

Areas of Agreement / Disagreement

Participants express differing views on the concept of a center of the universe and the implications of time dilation near massive objects like black holes. The discussion remains unresolved regarding the nature of time at the event horizon and the implications of gravitational effects on time perception.

Contextual Notes

There are unresolved assumptions regarding the definition of the "center" of the universe and the practical implications of time dilation near black holes. The discussion also touches on theoretical aspects of spacetime that may not be fully agreed upon.

|imbiQ
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My first post here so please go easy if this in the wrong place...

But I have a question which I think I know the answer too but need verification.

Situation: if there were 2 Earth's of same Mass and Gravity but one is at the centre of the universe (next to creation point-empty) and one was at the outer edge of universe (lots of space matter) time would be the same on both worlds.

Premise: Time is determined by the gravity and speed of light constant not the 'location' or how much other matter is closer to it.

So my question is : if you were on an Earth next to a black hole (lets just say you could survive) would time grind nearly to a halt?
 
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|imbiQ said:
Situation: if there were 2 Earth's of same Mass and Gravity but one is at the centre of the universe (next to creation point-empty) and one was at the outer edge of universe (lots of space matter) time would be the same on both worlds.

We don't think there's any center to the universe. I'm not sure what you mean by "time would be the same". If they were at rest with respect to one another, then they wouldn't measure any time dilation. If the Earth's were identical, I don't think they'd experience any gravitational time dilation either.


So my question is : if you were on an Earth next to a black hole (lets just say you could survive) would time grind nearly to a halt?

Everything would seem normal to you, but from the point of view of an outside observer, your time would have slowed down considerably, depending on how close you were to the event horizon.
 
OK to be more specific Centre of the Universe would be the point of the Big Bang occurrence.

Yes the second part is an objective (removed from the Earth's) view of time - then you would be viewing the two Earth's from a equidistant point.

Is the latest theory that at the event horizon time would stop all together? i can't remember..
 
|imbiQ said:
OK to be more specific Centre of the Universe would be the point of the Big Bang occurrence.

In space, there is no point of the big bang occurrence. If you imagine inflating a balloon from an infinitely small size (a two-dimensional analogy to the expansion of the universe), what point on the surface of the balloon would you call the center? The answer is that there is none. In other words, the big bang happened everywhere.

If by point of the big bang you mean the point in spacetime, then in theory, it would experience an infinite time dilation relative to any other point, though I doubt this is possible in practice.


Yes the second part is an objective (removed from the Earth's) view of time - then you would be viewing the two Earth's from a equidistant point.

If you're standing at a distant point and observing both Earth's, then they'll both have an equal gravitational time dilation relative to you (assuming you mean people on the surface).


Is the latest theory that at the event horizon time would stop all together? i can't remember..

Yes, but only from an outside point of view. From the point of view of the person falling in, all is normal.
 

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