In a video from The Associated Press, Jackie Faherty from the American Museum of Natural History explains that a total lunar eclipse is when the sun, Earth and moon are all perfectly aligned with the moon passing into the shadow of the Earth, causing it to “turn a deep red-orange color.”

A total lunar eclipse was visible across North America including Chicago Thursday night into Friday morning. The moon passed through the Earth’s shadow overnight, appearing to turn a rusty reddish color,