It's what holds them together.
(what's it like in your universe? ... since you're implying that yours is different.)
A galaxy is held together by the gravity of everything in it.
Feeling Gravitys Pull was created in 1985.
clusters of galaxies, galaxies, planetary systems, solar systems
planets, stars, moons, galaxies
stars solar system galaxies universe
they usually use super computers
The cast of Gravitys Pull - 2011 includes: Nicki Davis as Patricia Brittney Jean Blake as Maude Bernie Matthew as Donald
Galileo
the part where your mom came from
No. Gravity is a force with unlimited reach. Gravitys grip-force decreases with an increase in the distance between bodies. In a nutshell, there is no zero gravity, but there is very close to zero gravity. In the deep space between and at extreme distances from any galaxies we find what is effectively zero gravity.
Both structures contain huge numbers of stars.
The structures that play a major role in visual acuity are -macula -fovea centralis ..and possibly -optic disc
Gravity is the force that keeps galaxies and solar systems together.