The Artemis II mission is approaching its conclusion shortly. NASA astronauts Reid Wiseman, Victor Glover, Christina Koch, and Canadian Space Agency astronaut Jeremy Hansen have had an extraordinary journey as they circled the moon aboard their Orion spacecraft, named Integrity, setting a new record for the farthest distance traveled by humans. Their return to Earth is imminent, with an anticipated splashdown in the Pacific Ocean off the coast of San Diego, Calif., scheduled for tonight at 8:07 p.m. ET.
As they re-enter Earth’s atmosphere, the spacecraft will experience intense speeds of nearly 40,000 km/h, causing the capsule to heat up to 3,000 C. This challenging phase will subject the astronauts to almost 4 Gs, making them feel four times heavier than usual, akin to being under extreme pressure. In a recent press briefing, astronaut Glover described the experience as profound, reflecting on the imminent return to Earth.
Before the astronauts touch solid ground, several critical maneuvers will take place. The European Service Module, which has provided power to Orion, will detach before re-entry, approximately 20 minutes before the process begins. Subsequent adjustments to Orion’s trajectory, including roll maneuvers and distance from the service module, will be performed by the crew members in their spacesuits with visors down.
As the capsule re-enters the atmosphere, a plasma buildup will disrupt communication between NASA ground control and the astronauts for about six minutes, known as Loss of Signal (LOS). Following this blackout period, the deployment of drogue parachutes will slow the descent before the main parachutes activate at about 1,800 meters, reducing the speed to 32 km/h for a smooth splashdown off San Diego.
Upon splashdown, the astronauts will be greeted by the USS John P. Murtha, where they will undergo medical evaluations before returning to the Johnson Space Center in Houston. Additionally, the scientific data collected during the mission will be carefully managed and analyzed, contributing to future space exploration endeavors.