How to show that the universe is static( not expanding)

AI Thread Summary
To demonstrate a static universe, one approach involves equating the formulas for matter density (ΩM) and dark energy density (ΩΛ) to derive the cosmological constant. The discussion acknowledges that the actual universe is expanding but explores a hypothetical scenario for a project. The aim is to create a homework problem centered on dark energy while reflecting Einstein's original static universe concept. The participant expresses uncertainty about the validity of their method but seeks confirmation on their approach. Ultimately, the conversation highlights the challenge of conceptualizing a static universe in light of current cosmological understanding.
cpamieta
Messages
8
Reaction score
0

Homework Statement


how can i show the universe is static and not expanding, how it really is.


Homework Equations


\OmegaM=...
\Omega\Lambda=...



The Attempt at a Solution



"The expansion history of the universe depends on the amount of matter (gravity), quantified
by \OmegaM
M, and dark energy (anti-gravity), given by" \Omega\Lambda
So would setting these two formulas = to each other and solving for the cosmological constant, that would give me a static universe right? I am like 90% sure its right but want some conformation.
thanks
 
Physics news on Phys.org
It's not static, it's expanding.
 
i know its expanding lol just think of this as different universe that's static. We have a project and one part of it is to create like a homework problem. it has to be on dark energy, so i figured my problem would be using that formula and showing the universe is static, like what Einstein thought
 
nvm what i was thinking would not work
 
Thread 'Help with Time-Independent Perturbation Theory "Good" States Proof'
(Disclaimer: this is not a HW question. I am self-studying, and this felt like the type of question I've seen in this forum. If there is somewhere better for me to share this doubt, please let me know and I'll transfer it right away.) I am currently reviewing Chapter 7 of Introduction to QM by Griffiths. I have been stuck for an hour or so trying to understand the last paragraph of this proof (pls check the attached file). It claims that we can express Ψ_{γ}(0) as a linear combination of...
Back
Top