Starship HLS: SpaceX’s Lunar Spaceship

As NASA increases pressure on its partners to stay on schedule for the return to the Moon, SpaceX has released a detailed update on the lunar version of its Starship spacecraft. Named HLS (Human Landing System), this specific model will play a central role in the Artemis III mission, with the goal of landing the first astronauts on the lunar surface in over fifty years.

A Starship Built for the Moon

The Starship HLS is a direct evolution of SpaceX’s interplanetary spacecraft, adapted to the lunar environment. While the standard Starship is designed for missions in Earth orbit, Mars, or beyond, the HLS version is fully dedicated to lunar landings.

Its key differences are striking:

• No heat shield or flaps: HLS doesn’t need to reenter Earth’s atmosphere; it remains in space.

• Two large EVA airlocks for astronaut spacewalks, located near the top of the cabin.

• A pressurized elevator to lower astronauts and equipment from the cabin, which sits more than ten meters above the lunar surface.

• Modified Raptor engines capable of extremely precise thrust control for landings in low lunar gravity.

• A reinforced landing gear optimized for regolith.

• External solar panels and radiators to ensure power autonomy and thermal regulation during extended stays.

The HLS is not just an adaptation — it’s a specialized version of Starship, designed to become the first mobile lunar habitat in history.

A Giant Reusable Architecture

The Starship HLS retains the base structure of the standard Starship: 50 meters tall and 9 meters in diameter.
Its pressurized volume exceeds 600 m³ — about two-thirds of the International Space Station’s internal space — making it the largest crewed spacecraft ever built.

Inside, the cabin can be configured as needed:

• sleeping quarters,

• pilot and observation stations,

• scientific workspaces,

• storage for samples and EVA equipment,

• medical module and common living area.

SpaceX has already tested a full-scale mockup of the cabin to validate its life-support systems: oxygen and nitrogen injection, temperature and humidity control, noise reduction, and air purification.
The result is a spacious, quiet, and stable environment, designed to host several astronauts for long periods without loss of comfort.

Development on Two Fronts

SpaceX is advancing along two main axes:

1️⃣ The “Base” Starship

This is the orbital version, tested at Starbase (Texas) and soon from Florida. It serves as the technological platform for all variants.

To date:

• more than 36 Starships produced,

• 600 Raptor engines built,

• 11 integrated Starship + Super Heavy test flights,

• and a successful in-orbit cryogenic propellant transfer, a key step for future lunar missions.

2️⃣ The Starship HLS

Developed under a fixed-price NASA contract, SpaceX is paid only after each milestone is validated.
Out of 49 planned milestones, most have already been achieved, including:

• docking tests with the Orion spacecraft,

• landing leg tests on simulated regolith,

• engine landing simulations with representative thrust profiles,

• micrometeoroid shielding trials,

• validation of RF communications and navigation/landing software,

• full-scale testing of the lunar elevator with Axiom Space,

• and demonstrations of the onboard medical and telemedicine systems.

Next Steps: Long-Duration Flights and Propellant Transfer

The key innovation of Starship lies in its orbital refueling capability.

aBefore each lunar mission, several Starships will act as tankers, transferring liquid methane and oxygen to the HLS in Earth orbit. This large-scale technology is unprecedented and will be demonstrated in 2026, during a propellant transfer between two Starships.

A long-duration flight will also test propellant storage over several days and the thermal behavior of the tanks in microgravity. These milestones will be decisive: they will confirm the viability of NASA’s Artemis mission model, which relies on orbital refueling before heading to the Moon.

A Crewed Cabin Under Construction

SpaceX is currently assembling a fully functional Starship HLS, including:

• avionics and electrical systems,

• environmental and thermal management,

• communications and medical equipment,

• and crew interfaces.

This flight-ready prototype will be used for integrated system tests and for training future Artemis III astronauts.

A Key Step Toward Permanent Human Presence

The Starship HLS is not just a lunar lander — it’s a true mobile habitat, paving the way for continuous human presence on the Moon.

With a payload capacity of up to 100 tons, it could deliver pressurized rovers, inflatable habitats, or even reactors to power a future South Pole lunar base.

This modular, reusable logistics approach is what sets SpaceX apart from all previous programs.

The HLS will become the cornerstone of a complete lunar ecosystem and, eventually, the reference model for Mars missions.

In Summary

The Starship HLS represents a complete revolution in crewed spacecraft design:
✅ reusable,
✅ refuelable,
✅ gigantic,
✅ built to last.

If it delivers on its promises, it won’t just bring humanity back to the Moon — it will lay the foundations for an era where living and working beyond Earth becomes a reality.

Source:

SpaceX updates published on October 30, 2025 {here}