What is the Big Bang theory?
The Big Bang is the expansion (not explosion) that created the universe and the building blocks for matter. All the matter of the universe was compacted into a small ball with infinite density, known as a singularity. Singularities are also the centers of black holes. The next part of the the Big Bang theory is that the universe has been expanding from that ball (point) ever since. After the Big Bang, the universe cooled just enough for subatomic particles to form (protons, neutrons, and electrons). Those would form to become the simple atoms that make up our universe. Those simple atoms made up the gases that would form stars and later, galaxies. There are many theories explaining the beginning of the universe, but the Bang Theory is widely the most accepted.
The Big Bang is the expansion (not explosion) that created the universe and the building blocks for matter. All the matter of the universe was compacted into a small ball with infinite density, known as a singularity. Singularities are also the centers of black holes. The next part of the the Big Bang theory is that the universe has been expanding from that ball (point) ever since. After the Big Bang, the universe cooled just enough for subatomic particles to form (protons, neutrons, and electrons). Those would form to become the simple atoms that make up our universe. Those simple atoms made up the gases that would form stars and later, galaxies. There are many theories explaining the beginning of the universe, but the Bang Theory is widely the most accepted.