Gravity. Note that mostly it wasn't all that dense.
The Big Bang theory is the leading explanation for the origin of the universe, suggesting that it began as a extremely hot and dense point roughly 13.8 billion years ago. The Earth formed about 4.5 billion years ago through the accretion of dust and gas in the solar system as it cooled down.
The 'big bang' theory.
The Big Bang Theory is a scientific explanation for the origin of the universe. It does not specifically pertain to the Sun. The Sun is a star that formed billions of years ago from a collapsing cloud of gas and dust in our galaxy, not from the Big Bang event itself.
Hmph. The Big Bang theory did not form the sun. The big bang formed the elements hydrogen, then hydrogen began to create helium. Then stars were formed out of these two elements and that is how our sun was created.
not who? but what? the big bang theory is the #1 theory, and the galaxy was created by gas clumping together to form the galaxies we know today.
nebular theory
The Big Bang is a theory that discusses the origin of the universe (from a single point source of incredible density and energy) while the Nebular Hypothesis is a theory that discusses the origins of stars and their planetary systems (through the accretion of interstellar gas).
the big bang theroy
helium that`s what`s used because it can be cooled to almost 0 degrees kelvin
No. After the Big Bang, our best estimates is that the universe was about 90% hydrogen, 9% helium, and a fraction of a percent lithium. No heavier elements existed, and would not until they were created in the supernoval explosions of the first-generation stars.
There were no gas clouds prior to the Big Bang. Indeed, there were no atoms, no sub-atomic particles, and no quarks -- all of these came into being after the start of the Big Bang. What was there BEFORE our Universe started to expand? The answer is simple: we don't know.
Your question betrays a common misconception about the Big Bang -- that it was an explosion of dense matter into empty space. Despite many popular presentations that suggest this, it is SIMPLY WRONG. The Big Bang was an EXPANSION of space itself, and not into anything "out there," that took matter along for the "ride." Gas and dust did not form in our Universe till about 377,000 years after the start, so your question is even more bizarre. If your question is, "What existed BEFORE the Big Bang?" the answer is simple: we don't know. Plain and simple, our understanding of our Universe breaks down when we get to "before." Indeed, we can't even define what "before" means at that point!