Question

all the object in the universe attract each other' what is ts force of attraction called as?

Answer 1

Heyya!


=> All the object in the universe attract each other' what is ts force of attraction called as gravity.

=> It is because that universe is expanding that's why it seems that distance between galaxies are expanding.

=> It is analogous to below example:
You paint spots on a balloon's surface then inflate.  The space between the spots is increasing and each one is moving farther away from the others.

Hope it helps!☺️

Answer 2

it is because of the garavitational force and also by acceleration due to gravity