Heavenletters

Hi everyone

I need help. In this paragraph:

My laughter was so great that stars popped out, and the night sky was placed around them for padding. The sun burst forth and the modest moon vaulted around the Sun, and planets gave themselves names and made up stories that were true and made up at the same time.

I don't understand what this sentence means "…made up at the same time." What does it refer to? Does it mean that the stars completed the stories they were making up?

Oldooz