A Photographic History of Our Pale Blue Dot

Earth from Cassini Rings NASA

The Earth as seen by NASA’s Cassini Spacecraft on July 19, 2013. Were the small dot, halfway down the image and slightly to the right. Saturn and its rings are in the foreground. The blue haze is sunlight refracting from Saturn E ring, which is made of material shot into space from the moon Enceladus. Credit: NASA

A couple of weeks ago, the Cassini spacecraft, currently in orbit around Saturn, turned to look back at the Earth. It took a picture, and the result is stunning. Images of the Earth as seen by distant spacecraft have become a staple of planetary missions; hardly any leave the Earth without turning around to take a picture on their way to some far flung planet or moon. I madeĀ a slideshow for Discovery News showing, chronologically, how the “pale blue dot” images have evolved since we first saw the Earth from space in 1946. Taken together, they offer breathtaking perspective of our planet, what Carl Sagan called the pale blue dot. Because really, if you’re far enough, that’s all we are.


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