Who or what created planets and the universe and how were they created?

Answer 1

The universe was created by a quantum fluctuation, a rupture or tear resulting in the rapid expansion of space and the beginning of time. Scientists call that initial period "The Big Bang," though it was not a literal explosion in that matter itself did not come into existence until after the separation of the fundamental forces (gravity, electromagnetism, strong and weak nuclear forces) from each other.

Stars followed, when clumps of the expanding gas coalesced (via their own gravity) into larger clumps of matter, which in turn heated up to temperatures and pressures capable of sustaining nuclear fusion reactions. Elements heaver than primordial hydrogen and helium were synthesized by these nuclear processes, known as stellar nucleosynthesis.

Planets like earth would have formed at a later stage, when massive stars burst about spewing forth their newly forged elements into the heavens, which would coalesce into the circumstellar disks of nascent solar systems.