#1  
Old 29-07-2021, 11:54 PM
billdan's Avatar
billdan (Bill)
Registered User

billdan is offline
 
Join Date: Mar 2012
Location: Narangba, SE QLD
Posts: 1,546
Universe could be a Donut

A new study of the CMB suggests our universe could be shaped as a donut and not infinite.
The video has some good graphics.

https://www.youtube.com/watch?v=Rqd6y6hrrQg
Attached Thumbnails
Click for full-size image (Universe a donut.jpg)
78.4 KB36 views

Last edited by billdan; 29-07-2021 at 11:59 PM. Reason: grammar
Reply With Quote
  #2  
Old 30-07-2021, 09:04 AM
glend (Glen)
Registered User

glend is offline
 
Join Date: Jun 2013
Location: Lake Macquarie
Posts: 6,522
Yummm....donuts.

https://tenor.com/o9b9.gif
Reply With Quote
  #3  
Old 02-08-2021, 05:09 PM
Sunfish's Avatar
Sunfish (Ray)
Registered User

Sunfish is online now
 
Join Date: Mar 2018
Location: Wollongong
Posts: 1,665
Explains that sense of deja vu.
Reply With Quote
  #4  
Old 31-08-2021, 08:00 PM
Lariliss (Larissa)
Registered User

Lariliss is offline
 
Join Date: Jul 2021
Location: UK
Posts: 11
The observed universe is flat.
The CMB of the universe is more concentrated across one plane of the universe, forming a straight line in the universe. As the amount of radiation in one area is limited, itís indicative of the size of the area in that direction.
In theory, it can have a positive curvature, negative curvature, flat curvature, or possibly a combination of all two or three.
A positive curvature corresponds to a closed universe. In a closed universe, the expansion of the universe comes to a stop due to gravity, all matter collapses back into a singularity.
A negative curvature corresponds to an open universe. In an open universe the density is not large enough for gravity to take over, instead the universe will expand forever. It may slow down approximating to a limit, but never stop.
A flat curvature corresponds to a flat universe. In a flat universe space expands forever but will either accelerate or decelerate, according to the amount of dark energy.
With a torus, the geometry of the universe would be a combination of positive and negative curvature. The three-torus model of the universe. Here, the shape of the universe is a three-dimensional torus, while a donut is a two-dimensional torus.
Reply With Quote
  #5  
Old 01-09-2021, 04:55 PM
xelasnave's Avatar
xelasnave
Gravity does not Suck

xelasnave is offline
 
Join Date: Mar 2005
Location: Tabulam
Posts: 14,487
Really what point is served by unsupported specilation ... All we know it is appears flat which hardley gives rise to any speculation other than...it is flat.
Alex
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 08:22 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Advertisement
Limpet Controller
Advertisement
NexDome Observatories
Advertisement
Testar
Advertisement
Bintel
Advertisement
Astronomy and Electronics Centre
Advertisement