Friedmann_universes.svg
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Contents
Summary
Description Friedmann universes.svg |
English:
The
age
and
ultimate fate of the universe
can be determined by measuring the Hubble constant today and extrapolating with the observed value of the deceleration parameter, uniquely characterized by values of density parameters (Ω
M
for
matter
and Ω
Λ
for dark energy). A "closed universe" with Ω
M
> 1 and Ω
Λ
= 0 comes to an end in a
Big Crunch
and is considerably younger than its Hubble age. An "open universe" with Ω
M
≤ 1 and Ω
Λ
= 0 expands forever and has an age that is closer to its Hubble age. For the accelerating universe with nonzero Ω
Λ
that we inhabit, the age of the universe is coincidentally very close to the Hubble age.
|
Date | |
Source | Own work |
Author | BenRG |
Permission
( Reusing this file ) |
Public domain |
This file
supersedes
the file
Universe.svg
. It is recommended to use this file rather than the other one.
Reason why to use this file over the other file:
"Improvements: better dash patterns, more accurate curves (actual solutions of the Friedmann equations, not hand-drawn)."
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Formulas
This diagram uses the following exact solutions to the Friedmann equations:
See also
Some of the shown models are implemented as an animation at Cosmos-animation .
Licensing
Public domain Public domain false false |
I, the copyright holder of this work, release this work into the
public domain
. This applies worldwide.
In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose , without any conditions, unless such conditions are required by law. |