The Inflationary Epoch Of The Big Bang
From 10^-36 seconds to 10^-32 seconds after the Big Bang, the universe theoretically went through its Inflationary Epoch, growing exponentially from around the size of a quark to around the size of an orange. Elementary particles would have spread thinly across it, preceding the formation of exotic particles, including the Higgs boson. It isn't until 300 to 500 million years after the Big Bang that the first stars and galaxies appear.
Key Facts In This Video
The Big Bang occurred approximately 13.7 billion years ago. (0:18)
It's thought that Hydrogen and Helium formed about 3 to 20 seconds after the Big Bang. (1:24)
Our solar system and planet formed around 8 billion years after the Big Bang. (2:36)