ALT Image of Earth bisected by the terminator line. The terminator divides Earth\u2019s surface diagonally, shrouding the top left half in darkness. Earth\u2019s illuminated surface is mostly blue and covered in swirling white clouds. Credit: NASA

ALT Image of crescent Earth. Against the blackness of space, the shining blue and white of Earth appears like a smile. Credit: NASA

ALT Image of Earth from the Artemis II mission. Earth fills the bottom half of the image, its surface covered in blue water and swirling white clouds. Earth\u2019s limb is a blue glow against the curvature of Earth. Credit: NASA

ALT Image of Earth from the Artemis II mission. Earth fills the top half of the image. Through the gaps in white cloud cover, green and brown land masses are visible, as is blue water. Credit: NASA

ALT A full disk image of Earth, as seen from the Orion capsule. The planet is a pale blue, swirling with white clouds and glowing slightly lighter blue in place from reflected light. From about 8 to 9 o'clock, a large brown landmass is Africa, with the Iberian peninsula twinkling with lights just where the planet curves. At the 1 o'clock spot, aurora glow in a thin green glow, just barely separated from the planet's surface. Earth is set against the black of space. Credit: NASA/Reid Weisman