Gravity of the Universe?

Question

I am starting a new topic at school and I would like to know more about gravity. I think I understand this question, but I need to know what others think so that I know it is true. The question is:

Why doesn't the universe collapse into a single, extremely densly packed object due to the gravity?

Please help- I do have an idea but it is extremely general.

Thanks

Answer 1

God made it that way.

Answer 2

the universe is filled with galaxies moving away from each other at the speed of light..

i think the study of the big bang theory will be more helpful in this regard..

in general it states that all the galaxies in the universe were like a big ball.. kind of structure..as you said they were contracting into to form a single huge mass.. but contracting any mass generates heat.. and there may leading to extreme temperatures... these finally gave way and a huge explosion was caused.. which lead to the BIG BANG..

And this is clearly explained in the BIG BANG Theory..

for more clarification you can go through the life cycle of a STAR.

Answer 3

First of all you should understand that what we call gravity is caused by the presence of mass. Even a mass as small as our bodies produces a gravitational field. The next thing to know is that the strength of gravity decreases by a factor of four for every doubling of the distance from the mass generating it. Finally, after decades of careful studies of our universe, it's been determined that there simply is not enough mass in it to produce enough gravity to pull everything back together into a single point. We also know that space itself is growing larger all the time, so that on the scale of the universe the distance between major structures like galaxies is constantly increasing, therefore weakening the gravitional attraction they have on each other.