The Artemis II mission faces its most dangerous phase after completing its journey around the Moon. The Orion capsule is preparing to execute this Friday the reentry maneuver into the Earth's atmosphere, a process of barely thirteen minutes in which it will go from hypersonic speeds to almost completely stopping in a sequence where every second is vital.
The splashdown is scheduled for today at 02:07 (Spanish peninsular time) off the coast of San Diego, on the east coast of the United States,.and a joint operation between NASA and the US Navy is already planned to recover both the crew and the spacecraft.
Why are those 13 minutes decisive?
During reentry, the spacecraft will reach speeds close to 40,000 km/h in 13 minutes, which will subject it to temperatures exceeding 2,700 degrees Celsius. In that extreme environment, any error in the entry angle can be fatal: too shallow and the spacecraft would bounce back into space; too steep and it could disintegrate.
Before that moment, the capsule will execute a critical maneuver: the separation of the service module, remaining completely exposed and depending solely on its heat shield to survive.
How will the splashdown be?
The amphibious ship USS John P. Murtha is already heading to the designated area, prepared to recover both the crew and the vessel, which its own astronauts have called “Integrity”. This logistical deployment demonstrates the rigorous planning required to ensure the safety of those participating in these historic missions.
The inspections carried out by NASA, supported by advanced monitoring technology, have yielded reassuring results. According to Debbie Korth, deputy director of the Orion program, no problems that compromise the return have been detected.
Is it only a question of heat?
The impact with the atmosphere is not just a matter of heat. Astronauts will experience forces of up to 4G, multiplying their body weight and making even basic actions like breathing difficult. For example, if they weigh 70 kilos on Earth, during those moments their body will behave as if it weighed 280 kilos. Although it is worth noting that the temperature inside the apparatus will remain stable.
The thermal shield, designed with ablative material, will be consumed layer by layer to dissipate the heat, in a controlled process that will be key to protect the structure of the spacecraft.
A maneuver with “rebound” to survive
Unlike other missions, Orion will not perform a direct entry, but a “re-entry with bounce” (skip entry). This system allows the capsule to partially enter the atmosphere, rise again and subsequently begin the final descent.
This technique reduces thermal stress and improves trajectory control, allowing for more precise adjustment of the splashdown point.
His return to the Pacific
Overcome the most violent phase, a complex system of eleven parachutes will be deployed that will reduce the speed to about 30 km/h before impact with the Pacific Ocean, where a large rescue arrangement coordinated by NASA and the U.S. Navy awaits.
The astronauts will be evacuated by helicopter after splashdown and subjected to an immediate medical evaluation.
The re-entry of Artemis II is not only critical for the safety of the crew, but also because it will serve to validate the system after the doubts that arose in the Artemis I mission, when the thermal shield showed greater wear than expected.
The milestones of Artemis II
The success or failure of this maneuver will mark the future of the American space program and its objective of returning to the Moon with crewed missions.
Artemis II is not only a technological advance, but also a step towards a more inclusive and representative space exploration. The mission has marked important milestones: Victor Glover as the first black man to travel to deep space, Christina Koch as the first woman to achieve it, and Jeremy Hansen as the first non-American astronaut on a lunar mission.
Beyond the scientific achievements, the human experience has been profoundly significant for the crew. The connection among its members reflects the value of collaboration and diversity in large-scale projects.
Now, the world observes with attention the outcome of this mission: a controlled descent, a precise splashdown and a successful recovery that will symbolize not only the close of Artemis II, but also the beginning of a new stage in space exploration driven by joint work and shared vision.