The Blue Marble

The Blue Marble is a photograph of Earth taken on December 7, 1972, by the crew of the Apollo 17 mission. It is one of the most widely recognizable images of Earth, and has been used in many different ways, like on posters and in books. The Blue Marble shows a full-view of the Earth with white clouds, blue seas, and the Earth's land masses in brown and green. It looks like a big blue marble in the sky.