Jump to content

File:Spacetime-diagram-closed-universe-conformal-coordinates.png

From Meta, a Wikimedia project coordination wiki

Original file (3,840 × 1,428 pixels, file size: 104 KB, MIME type: image/png)

This is a file from the Wikimedia Commons. The description on its description page there is copied below.

Summary

Description
English: Lightcone RL (orange), Hubbleradius RH (blue), Particlehorizon RP (green) and maximal separation distance RM (purple) in a closed universe (Ωr=2, Ωk=-1). Coordinates: comoving distances R by conformal time η=RP/c (x=R, y=η). The lightcone origin is at the turning point at Scalefactor a=√2 when the Hubbleparameter H=0 and the universe is between expansion and contraction. The big bang is at the bottom and the big crunch at the top of the vertical η axis.
Date
Source Own work, relativity.yukterez.net/o/bigcrunch.html
Author Simon Tyran, Vienna (Yukterez)
Other versions
big crunch universe (Ωr=2, Ωk=-1) proper
big crunch universe (Ωr=2, Ωk=-1) comoving
big crunch universe (Ωr=2, Ωk=-1) conformal
flat universe (Ωr=1) proper
flat universe (Ωr=1) comoving
flat universe (Ωr=1) conformal
flat universe (Ωm=1) proper
flat universe (Ωm=1) comoving
flat universe (Ωm=1) conformal
hyperbolic universe (Ωk>0, ΩΛ=0) proper
hyperbolic universe (Ωk>0, ΩΛ=0) comoving
hyperbolic universe (Ωk>0, ΩΛ=0) conformal
big rip universe (Ωr+Ωm+ΩΛ=1) proper
big rip universe (Ωr+Ωm+ΩΛ=1) comoving
big rip universe (Ωr+Ωm+ΩΛ=1) conformal
flat universe (Ωr+Ωm+ΩΛ=1) proper
flat universe (Ωr+Ωm+ΩΛ=1) comoving
flat universe (Ωr+Ωm+ΩΛ=1) conformal
milne model (Ωk=1) proper
milne model (Ωk=1) comoving
milne model (Ωk=1) conformal
milne model (Ωk=1) minkowski

Licensing

I, the copyright holder of this work, hereby publish it under the following license:
w:en:Creative Commons
attribution
This file is licensed under the Creative Commons Attribution 4.0 International license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.

Captions

Spacetime diagram of a closed big crunch universe, conformal time

Items portrayed in this file

depicts

30 November 2024

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current06:54, 4 January 2025Thumbnail for version as of 06:54, 4 January 20253,840 × 1,428 (104 KB)Yukterezinclude the maximal separation distance rM=πrk with rk=c/H/√[-Ωk]
21:26, 1 December 2024Thumbnail for version as of 21:26, 1 December 20243,840 × 1,428 (103 KB)YukterezUploaded own work with UploadWizard

The following page uses this file:

Global file usage

The following other wikis use this file:

Metadata