In recent developments, NASA Artemis II astronauts are headed to the far side of the Moon after freeing themselves from high Earth orbit.
According to a statement released by NASA on
Interestingly, Artemis II’s journey to the Moon is no ordinary “point and shoot” mission. Unlike the Apollo missions, which aimed for the fastest direct route to lunar orbit, Artemis II deliberately took a more circuitous, 10-day path based on a “free-return trajectory”.
safety first approach
Unlike Apollo, which performed a translunar injection immediately after reaching Earth orbit, Artemis II spent its first 24 hours in highly elliptical Earth orbit performing necessary safety checks, ensuring the smooth functionality of the Orion spacecraft.
The crew also used this time to practice “proximity operations” by manually steering Orion near the expended ICPS rocket stage to test handling qualities.
By simulating docking maneuvers, the crew will collect essential data needed for future landings on the Moon.
Gaul is class, not just height
Traveling in space is not just about going straight up as this straight path would waste huge amounts of fuel. Eventually a fuel-depleted spacecraft would be pulled back to Earth by gravity.
Therefore, to last longer in space, the spacecraft must travel sideways so fast that it falls around the curve of the Earth. That’s why Artemis II circles the Earth before exiting.
Figure-8 Trajectory: Free-return trajectory
Artemis II is not entering lunar orbit. Instead, it will follow a “figure-eight trajectory,” rotating the spacecraft around the far side of the moon. This path is known to use the Moon’s gravity as a “slingshot”.
For example, if Orion’s engines would not function after the “translunar injection” burn, the spacecraft would naturally be pulled back toward Earth by gravity without the need for further propulsion or additional burn.
What makes the Artemis II lunar mission unique is that it plans to reach a record-breaking distance from Earth, more than 248,000 miles from Earth, which is the greatest distance ever reached from Earth during this phase.
While the Apollo missions would pass 60–70 miles below the surface, Artemis II would pass 4,000 to 6,000 miles above the Moon.
This “high-altitude” lunar flyby provides a broad field of view of the lunar far side and places the spacecraft in a safe gravity corridor for the return trip to Earth.
The figure-8 route will also give astronauts the opportunity to conduct deep space experiments, which will help the agency with future Artemis III and IV missions.
