A total lunar eclipse will make the moon appear red across the Western Hemisphere during the "Blood Worm Moon" this week.

Late Thursday night or Friday early morning, North Americans with clear skies can look up to see a full moon with a beautiful reddish hue — also known as a "blood worm."

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.