Question

What holds a galaxy together?
a. atomic attractions
b. electricity
c. magnetism
d. gravity

Answer 1

Galaxies usually have a black hole in the center, and the black hole's gravity is HUGE, really huge, enough to keep a galaxy together. While magnetism and electricity between planets and stars is not that huge. And atoms here on earth don't really affects others planets or stars.

Answer 2

so d right?

Answer 3

Correct. when you start looking at really small thing such as atoms you will learn that what holds the electrons to the protons is an electric force.

Answer 4

Thanks man.