Earthrise

Just how beautiful is our planet? This beautiful: Holy sweet mother of Earth. This incredible photo was taken by the Lunar Reconnaissance Orbiter, which has been mapping the Moon since it achieved orbit in 2009. Its cameras are usually pointed straight down (what's called nadir viewing), but sometimes the whole spacecraft is rotated to point them toward the horizon, or even up into space, to measure the Moon's incredibly thin atmosphere (called an exosphere, which, c'mon, is an extremely cool wo...