Sam Ximenes of Astroport Space Technology and the WEX Foundation on lunar development & impressive STEM Middle School Education!
Quick Summary: The program focused on discussing space architecture developments over the past 18 years, including the impact of reduced launch costs and the current state of lunar mission initiatives. The conversation covered technical details of lunar construction projects, including power requirements, reactor deployment, and the development of construction equipment and materials for moon bases. The discussion concluded with an overview of funding sources, regulatory challenges, and educational programs related to lunar exploration, emphasizing the importance of NASA partnerships and commercial opportunities in space infrastructure development. Joining us in the program were John Jossy, John Hunt, Bill Gowan, Marshall Martin, and Dr. Ajay Kotari.David and Sam discussed the significant changes in space architecture over the past 18 years since he was first a guest on The Space Show. Sam highlighted the reduction in launch costs as a key enabler. Sam explained his focus on using plant material for industrial processes like 3D printing on the moon. The discussion concluded with an overview of upcoming Space Show programs and a reminder about listener-supported fundraising efforts including Substack subscriptions.Sam discussed the significant impact of reduced launch costs on space exploration, highlighting SpaceX’s role in this development. He expressed concerns about the U.S. lagging behind China in lunar missions and emphasized the importance of maintaining a strong pace in space leadership. Sam also detailed Astroport’s efforts to build moon ports, including the development of a 15-acre testbed in Midland, Texas (west Texas) to simulate lunar conditions for testing construction and engineering techniques. He stressed the need for further research into civil engineering and geotechnics for moon base construction, as well as the importance of cargo complement and autonomous construction technology.We talked quite a bit about landing pads and Sam showed creative videos of their lunar development, construction and land pad plans via Zoom screen sharing. Sam explained that while the Artemis III landing pad is planned for the 2030s, their fusion surface power program might require building the power reactor foundation first, which would involve bringing construction equipment in the first landing. They are developing a brick bot as a technology demonstrator to be launched by 2028, and while they have some interface with Starship, they are not directly working with them. Sam emphasized the importance of standardized containerized cargo for logistics, Our Space Show program team asked about the power requirements for various tasks, noting that NASA mentions 100 kilowatts but questioning if more power would be needed for activities like sintering regolith and building roads.Sam also explained the power requirements for their lunar construction project, noting that while 20 kilowatts is sufficient for brickmaking, more power is needed for other tasks. He described plans to use portable solar power towers to generate energy for rovers and construction equipment, with potential suppliers including Astrobotic and Honeybee. Our guest also emphasized that they would act as general contractors, subcontracting various components to partners like Astrobotic for mobility platforms and other utilities. He concluded by showing an additional video of the construction layout and deployment process for the reactor and associated equipment.We discussed the development of lunar landing pads give I asked him to describe one in detail. Sam said that they would be 100 meters in diameter with a 50-meter target landing area and a 25-meter apron. He described the construction materials, including interlocking bricks that are 50 millimeters thick, and highlighted challenges in creating bricks in a vacuum environment due to outgassing. He also presented their work on material science, including the use of biomass to create 3D-printed tiles and the development of an excavator with interchangeable implements for lunar construction.Our guest explained the system architecture for a brick-making demonstration on the moon, aiming to combine multiple processes into one platform to create bricks in a vacuum by 2028. He described a subscale vibrating compactor being developed and its power requirements. The group discussed the layout for a lunar base, including the need to place a nuclear reactor over a kilometer away from the habitation zone for radiation protection and to prevent blast effects from affecting assets. John Jossy questioned why the initial landing couldn’t be closer to the reactor site, but Sam clarified that the initial landing would be automated and not intended for return, with the goal of establishing a permanent outpost. Radiation exposure was a reason and safety measure were being carefully planned and designed into the project.The team discussed the logistics of deploying a nuclear reactor and associated equipment on the moon, focusing on the challenges of cargo capacity and the need to bring multiple pieces of equipment for both the reactor and landing pad construction. They explored options for power transmission, including the possibility of wireless power transmission, and discussed additional radiation protection measures, with Marshall suggesting the use of topology and walls to shield the reactor. Sam mentioned their work on the Lido mission in the Marius Hills area, which includes developing technologies for accessing and utilizing lava tubes, though these are not currently present at the South Pole site being considered.I asked about his sources o funding and if he was already generating revenue. Sam explained that Astroport is funded through NASA contracts and DOD contracts, with revenue generated through R&D, and they are preparing for Phase 3 funding next year. The team discussed reactor options, with John Hunt suggesting a pebble bed reactor, and Sam noted they will follow NASA’s chosen provider for the reactor. I inquired about his regulatory issues and challenges for putting equipment on the Moon and developing it much like the development of a large r/e project here on Earth. Sam mentioned regulatory and legal challenges for lunar operations, including the need for state government sanction and licensing, while John Hunt raised concerns about radiation exposure during human landings, which our guest suggested could be addressed by shutting down the reactor temporarily.Sam discussed the progress and challenges of developing lunar infrastructure in collaboration with Orbit Fab, focusing on water supply and fuel processing. He highlighted the need for further research on lunar dust impact on machinery and potential partnerships with humanoid robotic companies.Before concluding, I asked Sam to discuss his nonprofit WEX Foundation for middle school stem programs. I also stated I would like to do a separate Space Show program focused on WEX. Sam shared insights into the WEX Foundation’s STEM education program, which aims to engage middle school students in space exploration. Listen to the program which he described in some detail.Our discussion concluded with a conversation about the logistics and funding of lunar missions, with Sam emphasizing the importance of NASA as an anchor customer and the potential for commercial customers in the future.Special thanks to our sponsors:Northrup Grumman, American Institute of Aeronautics and Astronautics, Helix Space in Luxembourg, Celestis Memorial Spaceflights, Astrox Corporation, Dr. Haym Benaroya of Rutgers University, The Space Settlement Progress Blog by John Jossy, The Atlantis Project, and Artless EntertainmentOur Toll Free Line for Live Broadcasts: 1-866-687-7223 (Not in service at this time)For real time program participation, email Dr. Space at:
[email protected] for instructions and access.The Space Show is a non-profit 501C3 through its parent, One Giant Leap Foundation, Inc. To donate via Pay Pal, use:To donate with Zelle, use the email address:
[email protected] you prefer donating with a check, please make the check payable to One Giant Leap Foundation and mail to:One Giant Leap Foundation, 11035 Lavender Hill Drive Ste. 160-306 Las Vegas, NV 89135Upcoming Programs:Upcoming ShowsBroadcast 4448 ZOOM Dr. Mike Gruntman | Tuesday 21 Oct 2025 700PM PTGuests: Dr. Mike GruntmanZoom: Mike talks about his new book, “Neil Armstrong at USC and on the Moon”Broadcast 4449: Hotel Mars with Homer Hickam | Wednesday 22 Oct 2025 930AM PTGuests: John Batchelor, Dr. David Livingston, Homer HickamHome Hickam is the Hotel Mars guest this weekBroadcast 4450 ZOOM Phil Swan | Friday 24 Oct 2025 930AM PTGuests: Phil SwanZoom: Phil talks about going to Mars with kinetic energyBroadcast 4451 Zoom OPEN LINES | Saturday 25 Oct 2025 1200PM PTGuests: Dr. David Livingston, The Space Show Zoom Team & Zoom callersZOOM Open Lines discussion Get full access to The Space Show-One Giant Leap Foundation at doctorspace.substack.com/subscribe
South Africa