ALT The Moon fully eclipsing the Sun as seen from space. The Moon appears as a dark disc in a black sky, silhouetted by a glowing halo. Also visible are stars in the background, some of which are planets.

ALT A crescent Earth setting behind the Moon\u2019s horizon. Credit: NASA

ALT Earth setting behind the Moon as seen by the Artemis II crew. Over half the left side of the image is filled by the gray lunar surface, pocked with craters. Credit: NASA

ALT A close view of the Moon. Jagged circles of craters dot the gray surface, fading to dark on the left side of the image. Credit: NASA

ALT A crescent Earth setting behind a hemisphere of the Moon. 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 Wiseman

ALT A full disk image of Earth at night, as seen from the Orion capsule. The planet is a dark midnight blue. Swirling white clouds are visible against the darker surface. From about 8 to 9 o'clock, a large, very brown landmass is Africa, with the Iberian peninsula twinkling with lights just where the planet curves. Other tiny yellow dots of electric lights are sprinkled across the planet's surface. From the 3 to the 6 o'clock spot, a very thin crescent of blue light hugs the edge of the planet. Earth is set against the black of space. Credit: NASA/Reid Wiseman

ALT Earth as seen from the Orion capsule. It is divided sharply in half, with a line running diagonally from the 11 o'clock to the 4 o'clock. The lower left half is a bright pale blue. Its surface is covered with swirly, puffy white clouds, with texture indicating different thicknesses. The upper right half is dark, with no illumination from the Sun. Earth is set against the black of space. Credit: NASA/Reid Weisman

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