Moonbound Episode 1 | Charting the Course

Artemis 1 was an iconic mission, a starting point for our generation's exploration future. The next step is Artemis 2, which will carry a crew and pave the way for sustained missions to the Moon and then Mars. The team is ready, with spaceflight vehicles being built, rocket components assembled, and designs prepared. This mission marks the return to lunar space after over 50 years, with four explorers charting a course around the Moon. The Apollo generation showed what was possible, and now, returning to the Moon is an important endeavor, as it will serve as a staging area to learn for future Mars missions. Humans have only spent 72 hours on the Moon, so there is much to learn. The Artemis campaign involves a series of test flights, as there are many new systems to test after more than 50 years. Artemis 2 will focus on testing new systems to safely fly crew to the Moon and bring them back, setting up the goal of returning humans to the lunar surface. The knowledge gained from this mission is crucial for understanding how to get to Mars. Jeff Radigan, the lead flight director for Artemis 2, will direct spacecraft operations and communicate with the crew from mission control. Once the vehicle clears the tower, control shifts to mission control Houston, where a distributed team of specialists, led by the flight director, will manage every system on Orion. Natasha Peek, a flight dynamics officer, specializes in trajectory, knowing the spacecraft's location and destination, and how to bring it home if necessary. Artemis 2 is fundamentally different from low Earth orbit missions because it aims to rendezvous with the Moon, which is constantly moving. This requires precise orbital adjustments. The team prepares extensively for each launch window, developing end-to-end trajectories from liftoff to splashdown. Significant upgrades have been made since Artemis 1, including software and simulation environments. The main difference for Artemis 2 is the crew and the new systems supporting a crewed flight, which necessitate changes to launch commit criteria, procedures, and timelines. A full dress rehearsal of launch day activities, including medical checks, breakfast, and boarding the crew transfer vehicles, was conducted to ensure readiness. The presence of a human crew elevates the seriousness and rigor of the mission. The spacecraft must function as a mini-Earth, providing a breathable atmosphere, temperature control, carbon dioxide and humidity removal, and provisions for the crew. Artemis 2 will also flight-test other systems vital for human space exploration, such as life support, displays, and flight controllers, which were not part of Artemis 1. The distance to the Moon, 250,000 miles, means there are no shortcuts or quick returns. Every system is double, triple, and quadruple-checked to ensure accuracy and safety. The mission will prove Orion's capability to sustain astronauts in deep space and allow ground and crew teams to practice essential operations for future missions. The Orion spacecraft consists of the pressurized crew module and the service module. The European Service Module (ESM) provides electricity, water, air, and temperature control for life support. This international partnership is crucial for lunar exploration. With crew on board for Artemis 2, the testing of life support systems, including CO2 scrubbing, oxygen provision, and water, becomes paramount. The environmental control system is a complex integration of chemical, mechanical, and electrical engineering. Crew interfaces, including piloting the vehicle, will also be tested early in the mission while in Earth orbit, a capability not present in the uncrewed Artemis 1. Artemis 2 will also conduct scientific research in three main areas: understanding the space environment, its interaction with life and systems, and observing the Moon from a human vantage point for the first time in over 50 years. The crew will describe and document their observations for scientists on Earth, leveraging their training in geology and planetary processes. Human research on the crew members themselves will gather data on physiological adaptation to radiation and microgravity, which has been lacking for over 50 years. Launching atop an SLS rocket with humans on board will be an unprecedented experience. The 8.8 million pounds of thrust defeating gravity for a 5.8 million-pound vehicle will produce unique vibrations and sounds. The journey begins with launch from Kennedy Space Center, an eight-and-a-half-minute ascent to escape Earth. After booster and core stage separation, the upper stage will perform a perigee raise maneuver to establish a stable, highly elliptical high Earth orbit. From there, Orion will separate from the ICPS, and the crew will manually pilot the vehicle, simulating docking with the upper stage. This will test the vehicle's control authority and pulse sizes for future docking missions. Once the systems are confirmed solid, the Orion main engine will perform the translunar injection burn, setting the course for the Moon. A free-return trajectory, used only once before during Apollo 13, is deliberately chosen for Artemis 2 due to a lower risk tolerance for a crewed test flight. The three-day transit to the Moon will involve further system checkouts, including the radiation shelter and cabin depressurization capabilities for future docking with the Human Landing System (HLS). Around flight day five, the crew will fly by the Moon, between 2,900 and 7,900 nautical miles from the lunar surface, offering a unique view of the far side of the Moon. They will be the most separated from Earth any four humans have ever been. After the flyby, a three-day journey back to Earth will include more checkouts, such as depressurizing the cabin to a lower pressure for future flights. Finally, approaching Earth, the crew will prepare for reentry. The cockpit will be configured, final targeting and burns performed, and the crew will suit up and strap into their seats for the reentry sequence. The crew module separates from the service module, orienting its heat shield towards Earth. The capsule-shaped Orion will enter the atmosphere at tremendous speed, generating temperatures up to 5,000 degrees Fahrenheit, close to the surface of the sun. The heat shield is designed to absorb and transfer this energy, allowing a gentle descent under parachutes. This critical 19-minute reentry must be flawless, aiming for a splashdown within a couple of miles of the landing ship off the coast of San Diego in the Pacific Ocean. The recovery of the crew from the capsule will be tested in real-time. Artemis 1 provided valuable lessons, particularly regarding the vehicle's operation and flight. It successfully placed Orion where it needed to be, the upper stage performed a perfect burn, and Orion achieved a retrograde orbit around the Moon, reaching a distance further than any human-rated spacecraft before. Its skip reentry was a first. The primary objective of Artemis 1 was to test Orion's heat shield for lunar return. While the heat shield performed well, some small chunks of char were missing, an unpredicted occurrence. This led to an independent review and a decision to prioritize safety, understanding and mitigating the risks. Although delays can be agonizing, slowing down to understand the root cause of the heat shield ablation was crucial. Corrective actions are being implemented for Artemis 2 and Artemis 3. Had a crew been on Artemis 1, they would have been safe, but the uncrewed mission allowed for critical heat shield testing. Extensive tests confirmed safe flight under specific conditions, and this learning will be applied to future heat shield designs. Artemis 2 will be a 10-day, half-million-mile journey, testing every part of Orion, circling the far side of the Moon, and returning through Earth's atmosphere at over 25,000 miles per hour for a Pacific splashdown. NASA thrives on big ideas and bold exploration. The success of Orion means safely returning the crew and demonstrating a robust spacecraft for future Artemis missions. The goal is to continue exploring, learning, and going further. Artemis 2 will spur additional exploration and discoveries. This generation has the opportunity for its own "moonshot," demonstrating that collective focus can achieve anything. It's a new beginning for human exploration; the question is no longer if we will return to the Moon or reach Mars, but when. Artemis 2 is the first step, passing the baton to Artemis 3 to put humans back on the Moon, the ultimate objective.