I What If I Were Able to Remove All Matter From the Universe?

  • I
  • Thread starter Thread starter Strong Eagle
  • Start date Start date
  • Tags Tags
    Matter Universe
AI Thread Summary
The discussion revolves around the hypothetical scenario of removing all matter from the universe and its implications. Participants question whether the absence of matter leaves anything behind and if space-time can exist without it. The conversation highlights the conflict between magical concepts and established scientific principles, emphasizing that such a scenario violates known physical laws. Ultimately, the premise is deemed unscientific, leading to the conclusion that physics cannot address a situation where its fundamental principles do not apply. The thread is closed due to these considerations.
Strong Eagle
Messages
7
Reaction score
2
All of it. I make it magically disappear... I'm god, I guess.

When I remove all the matter, is there anything left? Is the nothing used to be occupied by all that matter "something"? Is the space-time sans matter, still space-time?
 
Space news on Phys.org
I'm afraid science has nothing to say about magic.
 
  • Like
Likes fresh_42 and 1oldman2
I believe you miss the point.
 
So what is the point then?
The Universe does have matter. and acceptable theories describe how it behaves.
 
Last edited:
Strong Eagle said:
I believe you miss the point.
I believe you miss V50's point. You cannot just make the matter disappear, it would violatewhat we know about how the world behaves and the description we have of it. You then want to know what physics has to say about this situation, which is asking what physics says about a situation where it is not applicable.

Since the premise of the question makes physics moot, I am closing this thread.
 
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##.
Back
Top