An image of the eastern hemisphere of the Moon as the Artemis II astronauts would see it from an altitude of about 7,000 kilometers. The Moon’s far side is mostly dark in this image, which is based on a simulated trajectory. The dark patches near the center of the sunlit portion are plains of ancient lava: Mare Marginis to the north and Mare Smythii to the south.

NASA Goddard/Ernie Wright

NASA’s Artemis II mission, set to send four astronauts on a nearly 10-day mission around the Moon and back, will advance the agency’s goal to land astronauts at the Moon’s south polar region and will help set the stage for future crewed Mars missions.

While the Artemis II crew will be the first humans to test NASA’s Orion spacecraft in space, they will also conduct science investigations that will inform future deep space missions, including a lunar science investigation as Orion flies about 4,000 to 6,000 miles from the Moon’s surface. From this distance, the Moon will appear to be the size of a basketball held at arm’s length and will provide a unique opportunity for scientific observations.

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