Stargazers on nearly one half of the world witnessed a total lunar eclipse overnight, as a rare cosmic lineup caused the moon to turn a shade of red.

Stargazers across a swath of the world marveled at a dramatic red "blood moon" during a rare total lunar eclipse in the early hours of Friday morning.

As the blood moon peaks on March 13, there will be a total lunar eclipse in the sky. Here's when it occurs and how to see it.