NASA’s Artemis II crew is nearing Earth after completing a historic lunar flyby aboard the Orion spacecraft. The mission, named *Integrity*, marked the farthest human journey from Earth to date, with the crew passing within 100 miles of the planet’s surface before initiating their return trajectory. On Tuesday, the four astronauts—Reid Wiseman, Victor Glover, Christina Koch, and Jeremy Hansen—experienced a quieter day as they prepared for a Pacific Ocean splashdown on Friday.

Communication with the International Space Station (ISS) highlighted the challenges of deep-space travel. The crew engaged in a 12-minute dialogue with ISS astronauts, including Jessica Meir, despite a 2.5-second delay caused by the vast distance. Meir remarked on the crew’s unique perspective: “I found myself noticing not only the beauty of the Earth, but how much blackness there was around it.” The exchange underscored the psychological and logistical hurdles of long-duration spaceflight.

Data transmission reached unprecedented speeds thanks to a new laser communication system, which downloaded 20 gigabytes of high-resolution images and telemetry in just 45 minutes—a stark contrast to traditional radio-based methods. Scientists are already analyzing the data, with mission lunar science lead Kelsey Young noting, “There is something in every image that surprises me.”

The Artemis II team also reflected on the cramped conditions of the Orion crew capsule, which offers less mobility than the ISS. As Earth grew larger outside the window, Wiseman joked about Hansen’s quip: “I’m not sure—I think we’re going to run right into it.” The mission’s success paves the way for future deep-space exploration, though challenges like radiation exposure and life-support systems remain critical hurdles.