The First Men To Have The Whole World In Their Sights

In one of the most reproduced images of all time, the crew of Apollo 17 captured the perspective of Earth known as "Blue Marble."

Christopher Potter’s new history of space flight, The Earth Gazers, charts the road to the first photographs of Earth — and how it changes an astronaut to glimpse the entire planet at once.

(Image credit: NASA/Newsmakers/Getty Images)