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