Question

in the big bang theory what exploded ?
when did it explode?
where did it explode ?
what was before that?
how did it expode??

Answer 1

A very dense matter exploded during big-bang. Some people think it is made of hydrogen and helium.
When did it explore? t (absolute time) = 0
Because no space exists during the explosion, it takes no where (space was constructed during the big-bang)
What was before that? undefined

Answer 2

mlutfi is completely wrong. The "Big Bang" is a misgnomer for what the theory actually says. The big bang theory soley says that the universe emerged from a RAPID and MASS expansion of matter and particles. There was no explosion but rather an expansion. The origin of the expansion is something that is still unsure of in cosmology. As to what was before that we cannot know, the bigbang is essentially when time began because time is just trackinghow objects change and interact, and before the bigbang we cannot know if anything ever existed. More interesting is that from the big bang was the creation of all four forces in the universe as well as matter AND antimater, in equal amounts this is another huge mystery in cosmology/physics.

Answer 3

http://science.nasa.gov/astrophysics/focus-areas/what-powered-the-big-bang/

Answer 4

Well, you see, there was no before because before the big bang, time did not exist. Time is a result of the expansion of the universe itself. But what will happen when the universe has finished expanding? (Mr.Nobdoy)

Answer 5

Prior to the big bank time traveled in the opposite direction and we are now living it.

Answer 6

The big bang can be broken more accurately into two sections. First, there was the "bang", except no particles, atoms, gluons, etc were created. None. The first thing ever created was light. The bang produced light. Extremely energetic light beams.

The universe went through a phase change essentially, which also had

The "big bang" wasn't big until there was something to drive expansion, until about .00000000000000000000000000000000001 seconds after the initial bang. And you guessed it, that thing was a special type of Higgs field called an inflaton field.

Okay, so maybe you didn't guess it.

Basically an inflaton field is a field of potential energy. It released it's pent up energy about the same time as it came in to existence, producing matter and radiation, and driving the expanse of space by a factor of 10^78 or

1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 times what it was before. That's what made the bang big.

As to where it happened... That one is much harder to expand. You see, every galaxy, everything "big" in the entire universe, is speeding away from everything else. Like pennies stuck to a balloon as it is being blown up. But that analogy is much harder to translate into our own situation.

Since a balloon is a 2 dimensional object (we're talking the surface here; you only need two points to describe it's position: latitude and longitude) in a 3 dimensional space (the air around it, etc), our universe is a 3 dimensional object in a 4 dimensional space. How you visualize the center of a 4 dimensional space is a mystery. Add to that the curvature of space (flat, positive, negative) and your guess is as good as mine.

As to when, however, it is much easier to figure out. Best estimates put the bang at 13.75 +/- .17 billion years.

It's old, it's big, and it's ours. ITS THE UNIVERSE :D