A celestial spectacle is set to grace the sky on Tuesday: a total lunar eclipse will make the moon appear blood red to millions of sky watchers across the globe. Eclipses happen when the sun, moon and Earth align in precise ways.

Early risers on Tuesday morning will be in for a rare celestial event over the Colorado skies. As long as our expected Tuesday storm clouds can hold off, skywatchers will be able to get a glimpse of a total lunar eclipse known as a "Blood Moon".