B Did energy begin to exist? Can energy exist without space and time?

AI Thread Summary
The discussion centers on whether energy began to exist at the Big Bang and if it can exist without space and time. Participants highlight the need for a clear definition of energy, noting that it is fundamentally a numerical concept rather than a tangible object. The idea of something "beginning to exist" before time is considered contradictory, complicating the inquiry. Additionally, it is suggested that the Big Bang may not represent the true beginning of the universe, as the concept of a "start" is not well-defined. Overall, the conversation emphasizes the complexities surrounding the nature of energy and its relationship with time and space.
Nathaniel Fisher
Messages
2
Reaction score
0
Did energy begin to exist at the Big Bang? Can energy exist without space and time?

Or don't we know?

When I've tried to research this I get a mix of different answers. I have virtually no understanding of science or physics in general FYI.
 
Space news on Phys.org
Atheism_is_True said:
Did energy begin to exist at the Big Bang? Can energy exist without space and time?
Well, first you have to define what you mean by energy.

You can start with the basics. It is not a thing. It is a number.

https://www.feynmanlectures.caltech.edu/I_04.html

The notion of something "beginning to exist" before time exists is something of an oxymoron. You'll have to put your question on much firmer footing before it can be answered.
 
  • Like
Likes lomidrevo and Nathaniel Fisher
Thank you for your help it's much appreciated.
 
Atheism_is_True said:
Did energy begin to exist at the Big Bang? Can energy exist without space and time?
The Big Bang was not the start of the universe. Whatever a "start" is is not even defined. It would be a discontinuity of time.
 
https://en.wikipedia.org/wiki/Recombination_(cosmology) Was a matter density right after the decoupling low enough to consider the vacuum as the actual vacuum, and not the medium through which the light propagates with the speed lower than ##({\epsilon_0\mu_0})^{-1/2}##? I'm asking this in context of the calculation of the observable universe radius, where the time integral of the inverse of the scale factor is multiplied by the constant speed of light ##c##.
Why was the Hubble constant assumed to be decreasing and slowing down (decelerating) the expansion rate of the Universe, while at the same time Dark Energy is presumably accelerating the expansion? And to thicken the plot. recent news from NASA indicates that the Hubble constant is now increasing. Can you clarify this enigma? Also., if the Hubble constant eventually decreases, why is there a lower limit to its value?

Similar threads

Replies
20
Views
2K
Replies
4
Views
2K
Replies
9
Views
3K
Replies
25
Views
3K
Replies
11
Views
2K
Replies
5
Views
2K
Replies
20
Views
1K
Replies
15
Views
3K
Replies
68
Views
9K
Back
Top