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

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.

As the Full Worm Moon rose overnight, skywatchers across the Americas turned their eyes — and their cameras — toward the sky. Over several hours, Earth's shadow slowly crept across the lunar surface, turning our celestial neighbor into a deep, blood-red orb.