Big Bang theory.

If The Universe Is 13.8 Billion Years Old, How Can We See 46 Billion Light Years Away?

q015 the big bang theory states that anebulae condensed and heated to become spinning accretionary disks then protostars then stars bthe earth formed 45 billion years ago by the accretion o 22917

Here's How We Know the Big Bang Happened

Big Bang Theory | Overview & Evidence

Big Bang breakthrough: astronomers report signs of the universe’s creation