What is the theory of the big bang?

Answer 1

its fairly complicated, but here's the watered down version:

all the stuff in the universe used to be one big ball of stuff squashed together. the gravity of all the stuff created pressure on the middle of the ball, and it had nowhere to go. eventually the pressure was so great that the ball exploded under its own weight, sending all the stuff outward for billions and billions of miles. that stuff, over time, became planets and stars and comets, all the stuff that makes up the universe. eventually, the gravity of it all will pull it all together again, and it will repeat.

thats the overall idea, more or less. and theres lots of variations of that idea also. and lots of theories that completely contradict this theory. its anyone's guess really. interesting stuff, but we'll never know in our lifetime.

Answer 2

In physical cosmology, the Big Bang is the scientific theory that the universe emerged from a tremendously dense and hot state about 13.7 billion years ago. The theory is based on the observations indicating the expansion of space in accord with the Robertson-Walker model of general relativity, as indicated by the Hubble redshift of distant galaxies taken together with the cosmological principle.

Extrapolated into the past, these observations show that the universe has expanded from a state in which all the matter and energy in the universe was at an immense temperature and density. Physicists do not widely agree on what happened before this, although general relativity predicts a gravitational singularity.

The term Big Bang is used both in a narrow sense to refer to a point in time when the observed expansion of the universe (Hubble's law) began — calculated to be 13.7 billion (1.37 × 1010) years ago (± 2%) — and in a more general sense to refer to the prevailing cosmological paradigm explaining the origin and expansion of the universe, as well as the composition of primordial matter through nucleosynthesis as predicted by the Alpher-Bethe-Gamow theory.

Answer 3

The big bang theory is one of the theories of how the universe was created which assumes that the universe started from a tremendously hot mass that in a certain time, collapsed which begins the story of the universe.

Answer 4

That all matter in the universe once was compacted into a very small mass which was tiny. That for some reason this mass exploded and all matter is traveling outward in space away from each of the other bodies of matter. And that the speed of the mass is measurable and precise. In effect it is the account given in Genesis: In the beginning ......without form and void.

This "big bang" was many billions of years ago, long before the earth and our solar system were formed. I think it is a reasonable explanation of what happened and it is consistent with biblical teachings.

Answer 5

The universe exploded from an extremely dense and hot point in space about 13.7 billion years ago.

There is controversy between the idea that the big bang explains the origin of the universe, or it just explains the earliest known phenomena.

Answer 6

In physical cosmology, the Big Bang is the scientific theory that the universe emerged from a tremendously dense and hot state about 13.7 billion years ago. The theory is based on the observations indicating the expansion of space in accord with the Robertson-Walker model of general relativity, as indicated by the Hubble redshift of distant galaxies taken together with the cosmological principle.

Extrapolated into the past, these observations show that the universe has expanded from a state in which all the matter and energy in the universe was at an immense temperature and density. Physicists do not widely agree on what happened before this, although general relativity predicts a gravitational singularity.

The term Big Bang is used both in a narrow sense to refer to a point in time when the observed expansion of the universe (Hubble's law) began — calculated to be 13.7 billion (1.37 × 1010) years ago (± 2%) — and in a more general sense to refer to the prevailing cosmological paradigm explaining the origin and expansion of the universe, as well as the composition of primordial matter through nucleosynthesis as predicted by the Alpher-Bethe-Gamow theory.[1]

From this model, George Gamow was able to predict in 1948 the existence of cosmic microwave background radiation (CMB).[2] The CMB was discovered in 1964[3] and corroborated the Big Bang theory, giving it more credence over its chief rival, the steady state theory.[The Big Bang theory developed from observations of the structure of the universe and from theoretical considerations. Observers determined that most "spiral nebulae" were receding from Earth, but did not grasp the cosmological implications of this fact, or realize that the supposed nebulae were galaxies outside our Milky Way.[5] Georges Lemaître, a Belgian Roman Catholic priest, independently derived the Friedmann-Lemaître-Robertson-Walker equations from Albert Einstein's equations of general relativity in 1927 and proposed, on the basis of the recession of spiral nebulae, that the universe began as a simple "primeval atom"—now known as the Big Bang.[6]

Edwin Hubble provided an observational basis for Lemaître's theory two years later. He discovered that, seen from Earth, light from other galaxies is redshifted proportionally to their distance from Earth -- a fact now known as Hubble's law.[7][8] Given the cosmological principle whereby the universe, when viewed on sufficiently large distance scales, has no preferred directions or preferred places, Hubble's law implied that the universe was expanding, contradicting the infinite and unchanging static universe scenario developed by Einstein

Answer 7

My theory is that the big bang was a nuclear fusion reaction, that caused the start of the masses of matter that became planets, suns, asteroids, and every other body of matter in the universe.

The only part of this that is mine is the nuclear fusion reaction part.

Answer 8

depends!!!!!!!!!! look up m-theory for one answer. the universe was created from a large explosion created from a singularity. the rest is very detailed, basically, explosion, gas clouds created and condense, stars are born and create helium and calcium etc. they blow up and create planets and the like. in fact every bit of matter in the universe once was inside a star. of course though there was no actual "bang" as space is a vacuum and sound wouldnt have travelled.

Answer 9

It is a theory that the universe began with a gigantic explosion from a highly condensed collection of matter.

Answer 10

I think it assumes that the whole world (stars ,planets,....)were created after great explosion called big bang.