The Lunar Limb and the Terminator Line

art002e014045 (April 6, 2026) - This view of the Moon captures the Terminator — the shifting boundary between day and night — where sunlight grazes the surface at a low angle.
Taken by the crew during the Artemis II Mission, the lighting accentuates the Moon’s rugged terrain, casting long shadows that reveal the depth and structure of craters, ridges, and surrounding highlands.