After 1 second from Big Bang expolsion Quark can form bond to create Protons(p+), Neutrons(n) and Electrons(e-). In the next few minutes our early universe cools, which enables Protons and Neutrons to form first Atomic Nucleus. After 300000 years first Atom is created. 200 million years later first Star was born. After billion years Galaxies are formed and finally after 9 billion years our Earth is born.