The National Aeronautics and Space Administration (NASA) is stepping up its efforts to build a permanent forward base near the moon's south pole. The planned base area will cover "hundreds of square miles." To this end, efficient and reliable surface transportation capabilities are regarded as a key link. In the latest announced lunar transportation plan, the "Pegasus" lunar rover developed by the American start-up Lunar Outpost was selected as one of the two lunar terrain vehicles (LTV) and will land on the moon with the first batch of "Artemis" astronauts.
Lunar Outpost stated that the "Pegasus" will be able to drive on the rugged and complex terrain of the lunar south pole. It can be driven by astronauts personally or remotely controlled through ground teleoperation, and has highly autonomous navigation capabilities. AJ Gemer, the company's co-founder and chief technology officer, said in an interview that Pegasus will "significantly extend the scope and duration of human activities on the moon in ways that were previously unachievable with the Apollo program."
In order to adapt to the dramatic temperature changes on the lunar surface, "Pegasus" is equipped with an advanced autonomous thermal management system that can continuously operate between extremely low and extremely high temperatures, thereby ensuring that key systems and batteries remain stable in shadowed craters and sunny areas. According to Lunar Outpost, the system will always operate automatically, and the thermal controls will adjust autonomously even if the vehicle is being driven manually by an astronaut.
According to the latest task orders announced by NASA on May 26, the agency awarded $219 million and $220 million, respectively, to Astrolab and Lunar Outpost under its Lunar Terrain Vehicle Services (LTVS) contract to develop their respective crewed lunar surface vehicles. In order to compress the schedule and control costs, NASA requires the two companies to develop a "simplified version" of the lunar rover based on the original plan and deliver a mission-ready model as soon as possible.
Lunar Outpost was reduced in size and iteratively designed based on the existing "Eagle" LTV, forming a more compact "Pegasus" lunar rover. The company used digital twins and multi-physics simulation technology to quickly iterate the structure and system, and manufactured two full-scale prototype vehicles in a short period of time and completed two rounds of testing with real people participating to meet NASA's updated requirements for quality, volume and performance.
Gemer recalled that when NASA significantly adjusted the LTV requirements and compressed the time schedule, the team "faced the difficulties" in a very short period of time and used high-fidelity digital twins and simulation tools, prototype vehicle testing and other means to ensure that the new indicators were reached within a limited period. He emphasized that the reason for the rapid response was that the team did not "start from scratch" but was built on years of experience in lunar exploration missions and autonomous driving tests.
The "Pegasus" is described as a "sporty" smaller version of the "Eagle" LTV, and the latter is partly based on the design of General Motors (GM)'s Hummer EV electric vehicle platform. Lunar Outpost is partnering with companies such as General Motors, Goodyear and Leidos to create this new generation of lunar “off-road vehicles.”
According to Lunar Outpost, both Pegasus and Eagle can operate continuously on the lunar surface for at least a year, and their total mileage is expected to be 100 times that of the Apollo-era lunar rovers. The lunar vehicles used in the three missions of Apollo 15, 16, and 17 traveled a total of approximately 56.2 miles (approximately 90.4 kilometers), and the design goal of the new generation LTV is to achieve larger-scale scientific surveys and material transportation.
NASA has put forward higher environmental adaptability requirements for these new lunar rovers, including the need to be able to drive into permanently shadowed extremely cold craters to perform missions to find and assess lunar water ice resources. All major space powers regard the lunar South Pole as the focus of future development. The reason is that there is a large amount of water ice contained in the local permafrost shadow pits. How to mine and utilize these resources in extreme environments is one of the core challenges currently faced.
NASA's Lunar Reconnaissance Orbiter (LRO) measured temperatures in partially permanently shadowed craters as low as minus 410 degrees Fahrenheit (about minus 246 degrees Celsius), while surface temperatures in areas exposed to direct sunlight can reach as high as 250 degrees Fahrenheit (about 121 degrees Celsius). Gemer pointed out that the lunar south pole "is one of the most demanding environments in the entire solar system," which poses unprecedented challenges to the vehicle's mechanical and electronic systems.
To this end, "Pegasus" has been optimized for this extreme environment since the beginning of its design, using Lunar Outpost's autonomous thermal control system and multiple thermal control technologies to keep key components operating normally in ultra-wide temperature difference environments. According to the company, these technical accumulations come from the experience of many previous "Explorer-class" exploration vehicle missions and autonomous mobile platform testing.
According to NASA's current schedule, Lunar Outpost needs to deliver a fully flight-qualified "Pegasus" lunar rover by November 2027. By then, barring major delays, Blue Origin's Blue Moon Mark 1 lunar lander will be responsible for delivering it to the lunar south pole.
Gemer said he looks forward to the smooth execution of the Pegasus mission and believes that the success of the mission will promote the transformation of lunar exploration from short-term exploration to long-term continuous operations, laying the foundation for the establishment of a permanent U.S. lunar surface base. He said that once the LTV can operate stably in the Antarctic environment, it will greatly enhance NASA's capabilities in water ice survey and resource utilization.
It is generally believed in the industry that the first batch of lunar terrain vehicles will determine to a large extent whether NASA can successfully obtain and utilize lunar water ice resources to establish a persistent presence on the lunar surface. If the mission is successful, these lunar rovers will not only pave the way for the infrastructure of the Antarctic base, but also provide key experience and technology accumulation for human expansion into the deeper solar system.