Big Bang Theory?

Question

Someone please explain this to me.

When we were studying about the Big bang theory in astronomy a couple months ago, I didn't quite get this: How could the universe and everything in it expand from a small mass of whatever? (Sorry I don't remember much, hence me asking this question.) Yes, I am Christian, and I understand that my faith affects how I believe on this topic. But I am seriously wanting to know. I mean, what *caused* this mass to expand?

I would appreciate serious answers and I am not trying to start a big huge debate here. thanks.

Answer 1

Edwin Hubble, an astronomer, used the doppler effect of light to determine that all the galaxies are moving away from each other at high speed. This naturally leads to the conclusion that the universe is getting larger, and that it was once smaller in the past. When you take this thinking to its logical conclusion, the universe must have exploded from a single point. Scientists don't really know why it happened, but it is generally accepted as the truth,even by the Pope. John Paul II himself accepted the big bang as the official act of creation. You can't argue with direct observational evidence, just like you can't argue with seeing something with your own eyes. As to what caused it, there are numerous theories, but no observational evidence.

Answer 2

The second and third answers are good. I just wanted to make a quick note that you made a slight misstatement. The universe didn't start with a small mass. It's had the same mass/energy all along (or else a fundamental conservation law is violated and we have to rethink a lot of physics). It is the space which expanded. And the theorists have not fully figured out all of the details of what made the inflation go just the way it did (nor have we figured out why we only see 10% of the matter cosmological calculations tell us we should see--the dark matter problem).

Answer 3

Actually the newest theory on the why of the Big Bang comes out of M-Theory. M-theory is a mathematic combination of String theory and Supergravity. When supergravity is applied to strings they become membranes. anyway, the theory is this: universes are contained within these "Branes". imagine a collision of 2 of these 'branes'. now the surfaces arent flat, they ripple. So these things collide, and at the points that they meet are 'Bangs' essentially. These varying points that the branes collide is what gives our universe the uneven distribution of matter that we observe. Thats it in a nutshell, take a look at the link below if you want. Its evolved out of some well developed equations and is very interesting to me at least!

Answer 4

the big bang theory,

at first there was nothing... then that nothing exploded.

the end.

its believable isn't it?