Hacker News new | ask | show | jobs
by kmeisthax 217 days ago
Galaxies have enough gravity to counteract the expansion of the universe.
1 comments

So do we see the expansion cancelled out by the gravity, or do we only see the gravity?

I mean, is it

    change = gravity
or

    change = expansion - gravity
Because this just made me wonder.. is "dark energy" simply the absence of gravity? i.e. just in regions where there is next to no matter/activity?
> do we see the expansion cancelled out by the gravity, or do we only see the gravity?

We see gravity overpowering expansion. Same way you can’t launch yourself into orbit by throwing lots of pennies at one a second.