A total lunar eclipse will light up the night sky tonight, turning the moon a reddish hue. Here's how and when to view it.

As the moon reflects the sun's light, the shadow dims the moon's glow. During the peak of a total lunar eclipse, the moon takes on a bit of a reddish hue as any leftover sunlight making it to the moon's surface is scattered by our earth's atmosphere.

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