NASA Artemis II: Flight plan, risks and how it prepares humans for Mars

NASA’s much-awaited Artemis II mission is scheduled for Wednesday, April 1, 2026, highlighting humanity's first trip to the Moon after more than 50 years of wait.

Currently, the SLS rocket and Orion spacecraft are sitting on Pad 39B at Kennedy Space Center. The NASA crew including Victor Glover, Reid Wiseman, Christina Koch, and Jeremy Hanse, is in final quarantine for their 10-day mission.

This mission is not just a journey to the lunar surface, the Artemis programme represents years of work, efforts, and finances worth $93 billion to date.

According to the lead Artemis II flight director, Jeff Radigan, the astronauts are going at least 5,000 nautical miles past the Moon, which is much higher than previous missions have gone.

The flight profile (10-day journey)

Artemis II follows a "Free-Return Trajectory," meaning the Moon’s gravity will naturally pull the spacecraft back toward Earth without needing a massive engine burn to return.

Artemis II is scheduled to take off from NASA’s Kennedy Space Center in Florida aboard the Space Launch System, which is the agency’s most powerful rocket.

Soon after the launch, the Orion crew capsule will separate from the rocket’s upper stage and enter a highly elliptical orbit around earth.

Earth orbit

The first 24 to 48 hours will be spent in high Earth orbit performing extensive systems checks before moving towards the Moon

Translunar injection

A major engine burn known as translunar injection pushes Orion out of Earth’s grasp toward the Moon.

Deep space monitoring

In next 3-4 days, the astronauts will continue evaluating spacecraft systems en route to father from Earth, pushing human presence deeper into space than ever before

Lunar flyby

Eventually, Orion will pass around the lunar surface on a free-return trajectory, reaching a distance of over 248,000 miles from Earth, the ever greatest distance from Earth during this stage.

Return to Earth

After achieving lunar flyby, the crew will further conduct deep-space tests before making their return to Earth.

Splashdown

As Orion comes near to Earth, it will shed its key components before making a plunge into the atmosphere at speeds of about 25,000 miles per hour. It also involves a high-stakes descent into the Pacific Ocean where recovery teams will be waiting.

Potential key risks

According to Fiona Antkowiak, one of nine flight directors assigned to Artemis II, as Orion passes into the atmosphere, it would experience the immense temperatures of more than 2000C, which could be the most dangerous few minutes of the mission.

Moreover, the risks of returning to Earth cannot be ignored. In January 2023, Space Shuttle Columbia disintegrated during re-entry, killing the seven astronauts on board.

Artemis II: A stepping stone to understanding lunar science

In the space race, the dry, dusty, and barren Moon has emerged as a valuable frontier due to the presence of worthy elements, such as rare earth elements. Given the scarcity of rare earth elements on the Earth surface, the ability to explore the lunar surface will give the countries access to these metals in high concentrations.

The presence of metals like Iron and Titanium used in everything from superconductors to medical equipment, will intensify the competition.

"It has water trapped in some of its minerals, and it also has substantial amounts of water at the poles," says Sara Russell, a planetary scientist at the Natural History Museum.

If we are able to find the water on the Moon, it means humans can expand their presence beyond Earth as water will not only be used for drinking but also for providing oxygen.

Artemis II will also contribute to lunar science, allowing the astronauts to study the lunar south polar regions and Orientale Basin.

By closely observing the lunar horizon glow, a faint glow caused by dust particles, the scientists could delve into dust behaviour on the Moon.

Test bed for future Mars missions

According to NASA, the purpose of the mission is to “explore the Moon for scientific discovery, economic benefits, and to build the foundation for the first crewed missions to Mars.”

According to Libby Jackson, head of space at the Science Museum, “Going to the Moon and staying there for a sustained period is much safer, much cheaper and much easier to be a test bed for learning how to live and work on another planet.”

Establishing a lunar base allows NASA to refine life-support systems, such as air and water recycling, in a controlled environment.

Before venturing to Mars, the engineers must test all these critical systems on the Moon as a failure of these systems on Mars could prove fatal. On the other hand, the Moon offers a much safer proving ground for troubleshooting.

Other mysteries to be unravelled

For scientists, the prospect of assessing fresh lunar material is the ultimate prize. According to Russell, the Moon serves as a “fantastic archive” of our own planet.

As the Earth has always been under the geological turbulence marked by the tectonic plates movement, winds, and rain, the geologically quiet and stable lunar surface offers an insight into the lost chapters of Earth’s earliest history.

Dawn of a new space race?

Artemis II is expected to lead to a new kind of space race. China is the primary "pacing competitor." While Artemis II orbits, China is advancing its Chang’e 7 mission (launching mid-2026) to the lunar south pole. They aim for a human landing by 2030, pushing for dominance in deep space.