About eight minutes after launch, the powerful rocket carrying the Artemis II crew will finish its climb through Earth’s atmosphere. At that moment, the Orion spacecraft separates and begins its journey through space. For the four astronauts on board, the mission has only just begun. Over the next 10 days, they will complete a carefully planned schedule of tests, observations, and historic milestones as humanity prepares to return to the Moon.
NASA’s Artemis II mission is designed as the first crewed test flight of the Orion spacecraft. Although the astronauts will not land on the Moon, their journey around it will play a crucial role in preparing for future lunar missions, including Artemis III.
Below is a look at how the Artemis II crew’s daily agenda is expected to unfold during the 10-day mission.
Launch Day and Orbit Preparations
The mission begins with the launch of the Space Launch System (SLS) rocket from NASA’s Kennedy Space Center. After liftoff, the rocket accelerates rapidly and reaches space within minutes.
About eight minutes after launch, the core stage separates and the Orion spacecraft is placed into orbit around Earth. Shortly afterward, the upper stage performs a key maneuver known as the Trans-Lunar Injection burn. This powerful engine burn sends Orion on a trajectory toward the Moon.
During the first several hours of the mission, astronauts begin activating spacecraft systems. They check communication systems, navigation tools, and life-support equipment. This early phase ensures the spacecraft is operating properly before traveling deeper into space.
Crew members will also deploy Orion’s solar arrays, which provide power throughout the mission.
Day 1: System Checks and Crew Orientation
Once Orion is safely on its path toward the Moon, the crew begins the first full day in space.
Astronauts perform detailed system evaluations of the spacecraft’s flight controls, environmental systems, and onboard computers. These tests are essential because Artemis II is designed to verify Orion’s ability to support human crews during deep-space missions.
Crew members also begin adapting to the microgravity environment. Floating inside the cabin requires practice, especially when performing tasks like operating equipment or preparing food.
In addition to system checks, astronauts will conduct communication demonstrations with mission control and record video messages for educational outreach.
Days 2–3: Traveling Through Deep Space
During the second and third days of the mission, Orion continues its journey away from Earth.
Astronauts perform additional spacecraft tests and navigation exercises. These procedures help mission controllers confirm that Orion’s systems function correctly during long-duration flights.
The crew will also conduct optical navigation tests. Using cameras and onboard computers, astronauts help verify the spacecraft’s position by observing Earth, the Moon, and stars.
Meanwhile, mission specialists monitor the spacecraft’s thermal systems, power usage, and radiation environment.
These days also include personal time for meals, exercise, and rest. Maintaining astronaut health is an important part of long-duration space missions.
Day 4: Approaching the Moon
By the fourth day, Orion begins approaching the Moon’s gravitational influence.
Mission control guides the spacecraft through trajectory correction maneuvers to ensure it follows the correct flight path around the Moon.
Astronauts will prepare cameras and instruments to capture images of the lunar surface. These observations help evaluate Orion’s external systems and provide valuable scientific data.
As the spacecraft nears the Moon, the crew will experience one of the mission’s most dramatic moments—seeing the Moon grow larger outside their windows.
Day 5: The Lunar Flyby
The fifth day marks the highlight of the Artemis II mission.
Orion will pass approximately 4,600 miles (7,400 kilometers) above the lunar surface during a close flyby. This maneuver uses the Moon’s gravity to redirect the spacecraft back toward Earth.
During the flyby, astronauts will document the Moon’s terrain with high-resolution photography. They will also test Orion’s navigation systems while flying behind the Moon, where communication with Earth temporarily drops.
This moment recreates a historic milestone similar to the Apollo missions of the late 1960s and early 1970s.
Days 6–8: The Journey Home
After completing the lunar flyby, Orion begins its return journey toward Earth.
During these days, astronauts continue testing spacecraft systems to gather data for future missions. Engineers are particularly interested in how Orion performs during extended deep-space travel.
The crew will also conduct additional navigation experiments and continue outreach activities, sharing the experience of traveling around the Moon with audiences on Earth.
Astronauts also take time to photograph Earth from deep space—a view only a small number of humans have ever witnessed.
Day 9: Preparing for Re-Entry
As the spacecraft approaches Earth, the crew begins preparing for re-entry.
Astronauts carefully inspect Orion’s systems, confirm navigation data, and secure equipment inside the cabin. Loose objects must be properly stored because the spacecraft will soon experience intense forces during atmospheric entry.
Mission control also reviews weather conditions in the planned splashdown zone.
These final checks ensure the spacecraft is ready for its return to Earth.
Day 10: Re-Entry and Splashdown
On the final day of the mission, Orion begins its descent toward Earth.
The spacecraft separates from its service module before entering the atmosphere. As it re-enters, Orion’s heat shield must withstand temperatures approaching 5,000 degrees Fahrenheit.
After slowing down in the atmosphere, a series of parachutes deploy to safely guide the spacecraft toward the ocean.
Orion is expected to splash down in the Pacific Ocean, where recovery teams will retrieve the spacecraft and assist the astronauts.
Why Artemis II Matters
Although Artemis II will not land on the Moon, the mission represents a major milestone in NASA’s Artemis program.
It will demonstrate that the Orion spacecraft can safely carry astronauts on deep-space missions. The data collected during the flight will help engineers prepare for Artemis III, which aims to land humans on the lunar surface for the first time in more than 50 years.