A half-century ago, three humans sailed into lunar orbit, looped around the moon 10 times, and returned home. By the time Earth’s gravity had once again fastened them firmly to the planet, the Apollo 8 crew were rightly celebrated as the first Earthlings to visit our celestial companion.

But their true legacy revealed itself three days later, on December 30, 1968, when NASA released an image taken on Christmas Eve that shows our home planet suspended above the moon.

Now called Earthrise, the image is legendary; a postcard from the first souls to truly leave Earth behind. True, spacecraft had sent back views like this before, but this photo was the first of its kind taken by a spellbound human