NPR logo First View Of A Lonely Planet

Science

First View Of A Lonely Planet

Saying goodbye on the journey into space NASA hide caption

toggle caption
NASA

Saying goodbye on the journey into space

NASA

From NASA's image of the day:

This picture of a crescent-shaped Earth and Moon — the first of its kind ever taken by a spacecraft — was recorded Sept. 18, 1977, by NASA's Voyager 1 when it was 7.25 million miles (11.66 million kilometers) from Earth.

You can keep up with more of what Adam Frank is thinking on Facebook.