See stunning photos of Earth taken from space by astronauts and robotic spacecraft, celebrating our home planet on Earth Day.

This Earth Day, we reflect on our home planet and look at Earth from space through history.

Astronauts and robotic spacecraft have captured breathtaking photos of Earth from space for decades. See the best images.

A photo from 1968 inspired the first Earth Day, but that's not the only iconic space photo of Earth that everyone should see ...