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.

The total lunar eclipse, also known as a blood moon, will hover over Texas skies late Thursday into early Friday.

A total lunar eclipse typically lasts long, as compared to general eclipse. Hence, a total lunar eclipse is visible to millions of people across wide areas. This occurs when the Earth passes directly between the Sun and the Moon.