Mom loved a blue moon. If there's more than one full moon in a month, the second one is called a "blue moon." Or more traditionally, when there are four full moons in a season (most seasons have three months and therefore three full moons), the fourth one is a blue moon.
A softened rainbow filled the sky, a bright fire burning at the base. It crept slowly upward in a semi-circle, then faded into a blue and purple hued sky, heavily laden with spots of stars. A streak cut through the starry sky, as if ripping the very fabric of time.