Big Bang vs Big Crunch: Universe w/No End

  • Thread starter Thread starter robert nies
  • Start date Start date
  • Tags Tags
    Big bang
AI Thread Summary
The discussion centers on the concepts of the universe's expansion and the implications of infinite space. It argues that if the universe is infinite or unbounded, it is not "heading" anywhere but is continuously expanding, resulting in an ever-increasing distance between objects. The terms "largest space" and "smallest space" are questioned for clarity, as they are not standard in scientific discourse. The need for references and clearer definitions is emphasized to facilitate understanding. Overall, the conversation highlights the complexities of discussing cosmic concepts without a shared vocabulary.
robert nies
Messages
2
Reaction score
0
Let us suppose that there is no largest space or no smallest space as it relates to the universe. If this were the case it would be impossible for you to determine which direction the universe was heading.You would always see an infinite amount of space ahead of you
and the space between objects always growing.
 
Space news on Phys.org
The universe isn't "heading" anywhere. It IS expanding. Since it is almost certainly either infinite or unbounded, yes you DO always see infinite space ahead of you.

I don't understand your concepts of "largest space" and "smallest space". What do you mean?
 
Robert nies, Welcome to Physics Forums!

Normally people post questions here about science and members provide guidance and or answers. Of course, some only make comments on a particular discovery, experimental result, or planned experiment. Those commentators always need to include references so others can study up on the subject before they can make their contributions.

You have posted three statements with no background reference. Your terms (largest space, smallest space, the direction the universe is moving, see an infinite amount of space in front of you) are not commonly used, so for me it is impossible to get your meaning.

Will you please explain the connection between the title of your post “Big Bang vs Big Crunch” and your statements?

Thank you,
Bobbywhy
 
Abstract The Event Horizon Telescope (EHT) has significantly advanced our ability to study black holes, achieving unprecedented spatial resolution and revealing horizon-scale structures. Notably, these observations feature a distinctive dark shadow—primarily arising from faint jet emissions—surrounded by a bright photon ring. Anticipated upgrades of the EHT promise substantial improvements in dynamic range, enabling deeper exploration of low-background regions, particularly the inner shadow...
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##.
Title: Can something exist without a cause? If the universe has a cause, what caused that cause? Post Content: Many theories suggest that everything must have a cause, but if that's true, then what caused the first cause? Does something need a cause to exist, or is it possible for existence to be uncaused? I’m exploring this from both a scientific and philosophical perspective and would love to hear insights from physics, cosmology, and philosophy. Are there any theories that explain this?

Similar threads

Back
Top