During a lunar eclipse, which is when the Earth lines up exactly between the moon and the sun, the moon appears darker because the Earth obscures the sun with its shadow. Only light from Earth’s atmosphere reaches the moon, which can tint the moon reddish with light reflected from sunsets and sunrises on Earth.

Skywatchers across the world will witness the first total lunar eclipse in three years. Here’s who will have the best views—and what gives the moon its eerie red tint.

On the night of March 13-14, 2025, all 50 U.S. states will witness a total lunar eclipse — the best “blood moon” until 2029. Totality will last 65 minutes.