What Is the Artemis Program?

The Artemis program is NASA’s plan to send astronauts back to the Moon for the first time in over 50 years. It is named after Artemis, the twin sister of Apollo in Greek mythology, which connects it to the original Apollo Moon missions of the 1960s and 1970s. The program aims to land the first woman and the first person of color on the Moon. Artemis is not just about visiting the Moon again — it is about building a long-term presence there. NASA is working with international partners and private companies to make this happen.

Why Are We Going Back to the Moon?

Scientists and engineers want to return to the Moon because there is still so much to learn. The Moon’s south pole has areas that have never been explored, and scientists believe there may be water ice hidden in permanently shadowed craters there. Finding water on the Moon would be a huge deal because it could be used for drinking, growing plants, and even making rocket fuel. Returning to the Moon also helps NASA practice the skills and technology needed for even bigger missions, like sending people to Mars. Each Artemis mission builds on the last to push exploration further.

The Powerful SLS Rocket

The Space Launch System, or SLS, is the most powerful rocket NASA has ever built. It stands taller than the Statue of Liberty and produces 8.8 million pounds of thrust at liftoff. The SLS is designed to carry the Orion spacecraft and its crew beyond low Earth orbit and all the way to the Moon. Its massive size and power are needed because the Moon is about 239,000 miles away from Earth. The first SLS rocket launched successfully during the Artemis I mission in November 2022.

The Orion Spacecraft

Orion is the crew capsule that sits on top of the SLS rocket and carries astronauts into deep space. It is designed to keep up to four astronauts safe during the long journey to the Moon and back. Orion has a special heat shield that can withstand temperatures of about 5,000 degrees Fahrenheit when it re-enters Earth’s atmosphere. During the uncrewed Artemis I mission, Orion traveled farther from Earth than any spacecraft designed to carry humans had ever gone — about 268,000 miles. The spacecraft splashed down safely in the Pacific Ocean after spending more than 25 days in space.

The Gateway Space Station

One of the most exciting parts of the Artemis program is the Gateway, a small space station that will orbit the Moon. Unlike the International Space Station that orbits Earth, the Gateway will serve as a stopping point for astronauts traveling to and from the lunar surface. It will be much smaller than the ISS, roughly the size of a small apartment. Astronauts will be able to live and work on the Gateway for weeks at a time while conducting science experiments. The Gateway will also help support future missions to Mars by testing how humans handle long stays in deep space.

The Human Landing System

To get from lunar orbit down to the Moon’s surface, astronauts will use a Human Landing System, or HLS. NASA selected SpaceX’s Starship as the first HLS vehicle for the Artemis program. Starship is being designed to land astronauts near the Moon’s south pole, where they will explore and collect samples. The lander will need to carry astronauts from the Gateway station down to the surface and then back up again. This is one of the most challenging parts of the whole program because landing safely on the Moon requires extreme precision.

Artemis Missions So Far and What’s Next

Artemis I launched on November 16, 2022, as an uncrewed test flight that sent the Orion capsule around the Moon and back. The mission lasted 25.5 days and was considered a major success, proving that the SLS and Orion work together as planned. Artemis II is planned to carry four astronauts on a flyby around the Moon without landing, making them the first people to travel to the Moon since Apollo 17 in 1972. Artemis III aims to land astronauts on the lunar surface near the south pole for the first time ever. Later missions, Artemis IV and beyond, will begin assembling the Gateway station and expanding exploration of the Moon.

How Artemis Prepares Us for Mars

One of the biggest long-term goals of the Artemis program is to prepare humanity for sending astronauts to Mars. The Moon serves as a testing ground where NASA can try out new spacesuits, habitats, and life support systems in a harsh environment that is much closer to home than Mars. Living and working on the Moon will teach astronauts how to deal with challenges like radiation, dust, and limited resources. The Gateway station will help scientists study how the human body handles months in deep space. Everything learned during the Artemis missions will help make a future crewed trip to Mars safer and more likely to succeed.