• Register
PhysicsOverflow is a next-generation academic platform for physicists and astronomers, including a community peer review system and a postgraduate-level discussion forum analogous to MathOverflow.

Welcome to PhysicsOverflow! PhysicsOverflow is an open platform for community peer review and graduate-level Physics discussion.

Please help promote PhysicsOverflow ads elsewhere if you like it.


PO is now at the Physics Department of Bielefeld University!

New printer friendly PO pages!

Migration to Bielefeld University was successful!

Please vote for this year's PhysicsOverflow ads!

Please do help out in categorising submissions. Submit a paper to PhysicsOverflow!

... see more

Tools for paper authors

Submit paper
Claim Paper Authorship

Tools for SE users

Search User
Reclaim SE Account
Request Account Merger
Nativise imported posts
Claim post (deleted users)
Import SE post

Users whose questions have been imported from Physics Stack Exchange, Theoretical Physics Stack Exchange, or any other Stack Exchange site are kindly requested to reclaim their account and not to register as a new user.

Public \(\beta\) tools

Report a bug with a feature
Request a new functionality
404 page design
Send feedback


(propose a free ad)

Site Statistics

205 submissions , 163 unreviewed
5,075 questions , 2,226 unanswered
5,348 answers , 22,744 comments
1,470 users with positive rep
818 active unimported users
More ...

  which force expands the dense materials at big banng?

+ 0 like - 1 dislike

@Winther dense materials will be more dense due to gravitational attraction .

so there will be a big force (and potential energy) for expanding of dense materials at big bang .

my be that is dark energy .

would you please answer me




Closed as per community consensus as the post is not graduate-level
asked Dec 11, 2017 in Closed Questions by seyedmohammad mohammadi [ revision history ] 1 flag
recategorized Jan 8, 2018 by dimension10

not graduate+ level.  Users with 500+ reputation may vote here to get it closed.

1 Answer

+ 0 like - 0 dislike

In the pre-inflation version of the Big Bang theory, very high relative velocities are part of the hypothesis on the very early state of the Universe. In the inflation theory, this is a consequence of the inflationnary accelerated expansion phase (which in particular involves some analogue of the "dark energy", where by "dark energy" I mean the cause of the recent accelerated expansion of the Universe).

answered Dec 11, 2017 by 40227 (5,140 points) [ revision history ]

user contributions licensed under cc by-sa 3.0 with attribution required

Your rights