NASA’s Artemis II mission is set to return on Friday, landing in the Pacific Ocean near San Diego. As this mission wraps up, NASA is preparing for its next endeavor, Artemis III. This upcoming mission marks a modification of the agency’s timeline, which now includes a flight in Earth’s orbit before lunar landings are attempted.
Navigating Key Decisions for Artemis III
NASA is focused on reducing risks associated with future lunar missions. To achieve this, Artemis III aims to operate in Low-Earth Orbit (LEO) rather than directly targeting the Moon. This strategic choice is designed to enhance the success rate of Artemis IV, the planned lunar landing mission.
Orbit Debates Ahead
During a recent news conference, NASA Administrator Jared Isaacman discussed crucial decisions regarding the orbit for Artemis III. The main points of discussion include:
- Determining whether to operate in Low-Earth Orbit (LEO) or High-Earth Orbit (HEO).
- Assessing the benefits and drawbacks of each orbit type.
LEO is defined as being between 160 km and 2,000 km from Earth, while HEO is over 36,000 km, surpassing geosynchronous orbit.
Mission Logistics
Artemis III will utilize the Orion spacecraft, likely carrying four astronauts, launched via a Space Launch System (SLS) rocket from Florida. A rendezvous in LEO will enable NASA to potentially avoid using the Interim Cryogenic Propulsion Stage (ICPS), preserving this component for upcoming Artemis missions. On the other hand, targeting HEO would necessitate the use of ICPS to reach the desired altitude.
Human Landing Systems
During the Artemis III mission, the Orion spacecraft will work in conjunction with NASA’s Human Landing Systems, which include:
- SpaceX’s Starship upper stage currently under development.
- Blue Origin’s modified Blue Moon lander.
The decisions made regarding Artemis III will set the stage for future explorations, ultimately leading up to the much-anticipated lunar landings encapsulated in the Artemis program.
