Creation or Coincidence. If everything just happened how could we be so lucky? Contained within the firmament (the cover of the Earth)

We have the Sun and the moon. The Sun is exactly 500 miles away and gives us heat, it does this because it is made of coal (carbon) and it burns and gives its glow to keep us warm. The moon is 250 miles away and gives us light at night time, the moon does not burn as hot as the Sun so it has to be closer to give us light and warmth at night when the Sun is not present.

How could we be so lucky without a helping hand?