The farthest journey in human history concluded Friday evening when NASA’s Artemis II astronauts returned to Earth after a flight around the moon. The crew’s Orion space capsule named Integrity splashed down in the Pacific Ocean off the coast of San Diego shortly after 5 pm Pacific Time, marking the end of a 10-day, more than 695,000-mile voyage beyond the far side of the moon and back.
The four-person crew of Artemis II—commander Reid Wiseman, pilot Victor Glover, mission specialist Christina Koch, and mission-specialist Jeremy Hansen—traveled a greater distance from Earth than anyone has before, reaching 252,756 miles from our home planet.
“We most importantly choose this moment to challenge this generation and the next to make sure this record is not long-lived,” said Canadian astronaut Hansen as the crew passed the previous record of 248,655 miles set during Apollo 13.
Integrity began its fiery descent when the spacecraft hit Earth’s atmosphere at about 24,000 miles per hour, entering a communication blackout and decelerating from friction as its heat shield reached temperatures of roughly 3,000 degrees Fahrenheit. The plan was for the capsule to deploy two drogue parachutes at an altitude of about 22,000 feet, slowing it to about 200 miles per hour, then deploy pilot chutes pulling the three main parachutes at roughly 6,000 feet. This would further slow the spacecraft to around 20 miles per hour before it splashed into the ocean.
During their mission, the Artemis II crew saw things that no human has seen before. Flying higher above the lunar surface than the Apollo missions, the astronauts were the first people to see the entire disk of the moon’s far side. They also witnessed a solar eclipse from the vicinity of the moon as the sun slipped behind the lunar disk and illuminated it from behind.
“Humans probably have not evolved to see what we are seeing,” said NASA astronaut Glover during the eclipse. He and the rest of the crew described a halo of light surrounding the moon while one side of the lunar surface was bathed in earthshine. Venus, Mars, and Saturn shone among the stars. “It is truly hard to describe. It is amazing.”
Artemis II began on April 1 when the crew launched from NASA’s Kennedy Space Center in Florida atop the 322-foot-tall Space Launch System rocket, the most powerful vehicle to ever carry humans. After conducting multiple altitude-raising engine burns and testing the manual controls of the spacecraft, the crew proceeded with the engine firing known as translunar injection on day two of the mission, which sent them on a trajectory to the moon.
For the next three days, the crew tested the Orion spacecraft’s systems, practiced putting on their spaceflight suits, conducted additional course correction burns, manually flew the Orion capsule again, and prepared for the lunar flyby around the far side of the moon. They also had trouble venting wastewater from the Orion capsule’s toilet into space.
“We definitely have to fix some of the plumbing,” NASA administrator Jared Isaacman said during a conversation with the crew.
At 12:41 am Eastern Time on April 6, Artemis II entered the lunar sphere of influence, where the moon’s gravity overcomes that of Earth. That day, the crew made their closest approach to the moon, flying to about 4,000 miles above the lunar surface. During the lunar flyby, the crew communicated with a team of scientists on the ground, both before and after a roughly 40-minute communication blackout on the far side, to describe geologic features such as craters and canyons.
