NASA just LEAKED SpaceX's Starship HLS Cabin Interior!

What's it actually going to be like inside Starship on the way to the Moon? Will there be tables, chairs, sleeping areas? Will there be enough room for astronauts to move around comfortably? Well, thanks to NASA's latest HLS update, we don't have to wonder as much anymore. Today, we're taking a trip inside this incredible spacecraft to explore what life could be like for the astronauts, what kind of facilities they'll have, and just how close SpaceX is to turning this ambitious lunar lander into a reality. NASA's latest Starship HLS updates, presented at IAC 2026, have given us a much better look at just how far this lunar lander has come. And honestly, it's becoming clear that this is no longer just an ambitious concept. There's a huge amount of real engineering, testing, and hardware development going into making it happen. The main goal is still to demonstrate the capabilities needed to land Artemis astronauts on the Moon, with NASA targeting the first crewed Starship landing in 2028. And one of the really cool provider milestones is that SpaceX is developing something called HLS Cabin 1, with completion targeted for the fourth quarter of 2026. After that, operational testing is planned for early 2027, followed by airlock demonstrations in the second quarter of the year. Now, what exactly is Cabin 1? Basically, it's a full-scale, flight-like prototype of the Starship HLS crew cabin. Think of it as a life-sized version of the actual living space astronauts will eventually use on the Moon. It's designed to match the real cabin layout as closely as possible, allowing astronauts to practice their procedures, test the equipment, and get familiar with how everything works before they ever fly. And the really interesting part is that this isn't just an empty mock-up with a few seats and screens thrown in. The cabin is intended to incorporate functional systems for avionics and power, crew equipment and mechanisms, environmental control and life support, communications, and thermal control. In other words, SpaceX can use it to test how these systems work together, while giving astronauts a much more realistic environment to train in. And for us, that means Cabin 1 could offer one of the clearest looks yet at what life inside Starship HLS might actually be like. So, what is it like inside Starship HLS? First of all, this thing is enormous. The planned pressurized cabin volume is more than 600 cubic meters. To put that into perspective, that's roughly two-thirds of the International Space Station's pressurized volume, depending on how the volumes are counted. And compared with the Apollo Lunar Module, which had only a tiny cabin for two astronauts, the difference is absolutely massive. Starship HLS, on the other hand, is being designed to give astronauts room to live, work, sleep, and carry out scientific activities during extended stays on the lunar surface. The cabin is arranged across multiple levels, making use of Starship's enormous internal space. Some areas could have ceilings approaching 30 feet, although the exact usable height depends on the final layout. The overall idea is to keep the interior relatively open, with equipment and storage integrated into the design rather than having everything scattered around the cabin. So, let's start at the top. One of the most interesting areas is the flight deck, sometimes described as the bridge. This is where the crew can monitor the spacecraft and interact with its controls. The planned layout has included flight seats similar to those used in Crew Dragon, along with touchscreen interfaces for operating the vehicle. And just imagine sitting up there, looking out through the windows as the lunar surface stretches out below you. Depending on the vehicle's orientation and position, the crew could also get incredible views of Earth from lunar orbit or the surface. Of course, the flight deck is only one part of the cabin. The astronauts will also need somewhere to sleep and somewhere to relax during their mission. That's where the private crew quarters come in. Early interior concepts have shown compact sleeping stations inspired in part by the kind of private sleep spaces found on the ISS. These give each astronaut a place to rest without needing an enormous amount of room. Some early Starbase mock-ups showed around sleeping spaces arranged around a central passageway with ladders connecting different levels the final layout may evolve as development continues but the basic idea is simple give the crew some privacy while making efficient use of all that interior volume and because the moon has only about 1/6th of Earth's gravity moving around a cabin this tall would feel pretty different from moving around inside a spacecraft in orbit the crew will still need to follow safety procedures of course but there's There's certainly a lot more room to work with than Apollo ever had. Beyond the sleeping areas, Starship HLS also needs space for everyday activities. It's not just about giving astronauts a bigger place to sit, it's about making sure they can actually live and work there for several days without the whole cabin becoming a mess. Now, one of the most important parts of the entire design is the airlock system. Starship HLS is planned to use two airlocks, giving the crew dedicated spaces to prepare for surface excursions and move between the pressurized cabin and the outside environment. These airlocks are much larger than the cramped cabin of the Apollo Lunar Module, providing more room for spacesuits and the equipment needed for lunar surface operations. And instead of climbing down a long ladder as Apollo astronauts did, the Starship HLS is expected to use an elevator system to travel between the vehicle and the lunar surface. That's a pretty big change. Starship is so tall that getting astronauts safely down to the Moon's surface is a major engineering challenge in itself. The elevator is intended to make that journey much more practical, especially when the crew needs to transport equipment or carry out repeated trips. Of course, the elevator, airlocks, and associated systems will all need extensive testing before astronauts can rely on them during an actual mission. And underneath all these living and working areas, there's another side of the vehicle that we don't usually get to see. This is where systems such as life support, power distribution, thermal control, and additional equipment and storage come into play. They might not be the most exciting things to look at, but they're absolutely essential. The spacecraft needs to maintain a breathable atmosphere, remove excess heat, manage power, and keep everything functioning reliably while the crew is far away from Earth. And that's really what makes Cabin 1 so important. By testing functional crew systems inside a full-scale cabin, SpaceX can identify problems, refine the layout, and give astronauts experience with the equipment they'll eventually use. It also allows the team to test how different systems work together. Rather than treating every component as a separate piece of hardware, there's still a lot of work to do before Starship HLS is ready to carry astronauts to the Moon. But these cabin developments are an important part of that process. And with more than 600 cubic meters of planned pressurized space, Starship HLS could offer an entirely different experience from the tiny lunar lander that carried Apollo astronauts to the surface decades ago. So, if SpaceX can bring all these systems together and get the vehicle working as intended, the next generation of lunar explorers could have a lot more room to work with. For the uncrewed landing demonstrations, SpaceX is still targeting the fourth quarter of 2027 for Starship HLS, while Blue Origin's uncrewed MK2 landing demonstration is expected no earlier than the first quarter of 2028. So, there's a lot happening over the next couple of years. And SpaceX has some pretty important milestones to get through before any astronauts can actually set foot inside this thing. One of the biggest milestones is the first CAPE launch, currently targeted for December 10, 2026. That will be an important step toward expanding Starship operations beyond Starbase in Texas. Then, in the first quarter of 2027, we're expecting a propulsion demonstration, followed by the first launch from Launch Complex 37 at Cape Canaveral later that year. We're also expecting upgraded tank pressurization systems around the second or third quarter of 2027, followed by the first tanker launch for the uncrewed landing campaign in the third quarter. The actual landing demonstration is still targeting the fourth quarter. Now, of course, NASA's latest HLS update wasn't just about Starship, Because SpaceX isn't the only company working on a lunar lander for the Artemis program. Blue Origin is developing its own system called Blue Moon, and it has some pretty interesting milestones compared to Starship HLS. So, Blue's lander is about 52 feet, or 16 meters, tall, and it's powered by three BE-7 engines that burn liquid hydrogen and liquid oxygen. It also uses BT-7 thrusters for attitude control and maneuvering. Unlike Starship, which is designed to launch as a massive vehicle on its own, Blue Moon HLS will be tucked inside the payload fairing of Blue Origin's New Glenn rocket before launch from Launch Complex 36 in Florida. The lander itself is made up of forward, middle, and aft structural sections, which come together to form the complete vehicle. The crew compartment is located toward the aft end, and astronauts are expected to reach the lunar surface using a ladder. So, while Starship is going with a much larger vehicle and an elevator system, Blue Moon takes a more conventional approach to getting astronauts down to the surface. But the really interesting part is how Blue Origin plans to develop and test this system before putting astronauts on board. The company is building an uncrewed Blue Moon Mark I lander to demonstrate its technology and validate important systems before moving toward crewed lunar missions. According to the current development timeline, Blue Origin is targeting its first Blue Moon Mark I landing in the first quarter of 2027, followed by a second landing in the fourth quarter of that year, carrying NASA's Viper lunar rover. A third Mark I landing is planned for the first quarter of 2028, with a Lunar Terrain Vehicle, or LTV, intended to support future Artemis surface operations. These missions are important because they allow Blue Origin to demonstrate that its lander can deliver useful payloads to the Moon before the company moves on to the much more demanding task of transporting astronauts. There are also some major developments happening on the launch side. Blue Origin is targeting a New Glenn return to flight in the fourth quarter of 2026. Meanwhile, work is continuing on upgrades to Launch Complex 36, including preparations for a new 9x4 meter pad configuration, which is targeted for completion in the third quarter of 2027, with the first New Glenn launch using that configuration expected in the fourth quarter. And on the crewed side, the Artemis III crew vehicle hardware is targeted for completion in the first quarter of 2027, with a launch currently planned for the second or third quarter. One of the key steps in that process is demonstrating how the spacecraft will operate alongside Orion. The planned Earth orbit demonstration would involve rendezvous, docking, and undocking tests, helping validate the systems needed for future crewed lunar missions. Blue Moon could eventually be eligible to carry astronauts to the lunar surface on missions such as Artemis IV or Artemis V. depending on NASA's mission architecture and the progress of the program.