what was there in the start?
nothing, no space, no time
what happened in the start?
the big bang, when time begins, gravity pulls and all the elements explode outwards in clouds of incredibly hot gas
what happens when the universe cools?
spirals of gas and dust particles begin to form the suns and planets
what does gravity do?
it makes every object attract to each other
what do bigger particles have?
more gravity
what do smaller dust particles do?
they get pulled in like a snow ball rolling down a hill getting bigger