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 side view shows one of the twin SLS (Space Launch System) solid rocket boosters, core stage, and the Orion spacecraft with its launch abort system at Launch Complex 39B at NASA\u2019s Kennedy Space Center in Florida on Tuesday, Feb. 10, 2026. The orange core stage of the Artemis II rocket stands between two white solid rocket boosters and is topped with the white Orion spacecraft. To the left of the rocket stands the trussed structure of the mobile launcher. The sky is blue in the background. Credit: NASA/Ben Smegelsky

ALT A full moon is seen shining over NASA’s Space Launch System and Orion spacecraft, atop the mobile launcher at Launch Pad 39B at NASA’s Kennedy Space Center in Florida in the early hours of Feb. 1, 2026. The towering rocket, with its white and orange core stage and boosters, stands against the dark horizon, surrounded by support structures and cables. Credit: NASA

ALT NASA astronaut Suni Williams at Cape Canaveral Air Force Station’s Naval Ordnance Test Unit basin in Florida on March 28, 2018. Credit: NASA/Kim Shiflett

ALT The Apollo 1 crew stands together for a group portrait wearing their flight suits. From left to right: Virgil I. Grissom, Edward H. White, Roger B. Chaffee. Credit: NASA.

ALT The STS-51L crew pose for a group portrait and smile in their light blue flght suits. From left to right: Mission Specialist Ellison S. Onizuka, Pilot Michael J. Smith, Payload Specialist Christa McAuliffe, Commander Francis R. \u201CDick\u201D Scobee, Payload Specialist Gregory B. Jarvis, Mission Specialist Judith A. Resnik, Mission Specialist Ronald E. McNair. Credit: NASA

ALT The STS-107 crew posing for a portrait in their orange spacesuits. Crew seated in front, from left, are: Astronauts Rick D. Husband, mission commander; Kalpana Chawla, mission specialist; and William C. McCool, pilot. Standing, from left, are: David M. Brown, Laurel B. Clark, and Michael P. Anderson, all mission specialists; and Ilan Ramon, payload specialist. Credit: NASA

ALT A memorial wreath inside the Kennedy Space Center Visitor Complex in Florida commemorates NASA\u2019s Day of Remembrance on Thursday, Jan. 23, 2025. The banner on the wreath reads: \"Remembering our fallen heroes.\" Credit: NASA/Cory Huston

ALT NASA\u2019s Artemis II Space Launch System (SLS) rocket and Orion spacecraft, secured to the mobile launcher, are seen as they make the 4.2 mile journey toward Launch Pad 39B, Saturday, Jan. 17, 2026, at NASA\u2019s Kennedy Space Center in Florida. The perspective of the image is from below the rocket looking up. The core stage of the rocket is orange and topped with the white Orion spacecraft and launch abort system. There is a white solid rocket booster on the side of the rocket facing the viewer. The sky is blue in the background. Credit: NASA/Aubrey Gemignani