Lockheed Martin Delivers Neutron Spectrometer for Lunar Water Detection

This article is based on an official press release from Lockheed Martin.

As Space-Agencies worldwide prepare to establish a sustained human presence on the Moon, the search for local resources has become a top priority. To support this effort, aerospace manufacturer Lockheed Martin has delivered a new instrument designed to detect lunar water ice, a critical component for future deep-space exploration.

According to a recent company press release, Lockheed Martin’s Neutron Spectrometer System (NSS) will help upcoming missions locate and characterize near-surface materials on the Moon. Developed in partnership with NASA, the compact device is slated to fly aboard the Lunar Polar Exploration (LUPEX) mission, an international endeavor led by the Japan Aerospace Exploration Agency (JAXA) and the Indian Space Research Organisation (ISRO) planned for 2028.

We understand that finding water on the Moon is essential for long-term lunar settlements. Instead of transporting heavy supplies from Earth, astronauts will need to rely on local water deposits to grow food, generate breathable air, and produce rocket fuel for further journeys to Mars.

Detecting Water Without Drilling

Locating water ice hidden in the permanently shadowed craters of the lunar South Pole requires specialized technology, as drilling into the rugged terrain presents significant mechanical challenges. The NSS, which Lockheed Martin notes is roughly the size of a desktop printer, is designed to map out water deposits by measuring cosmic ray interactions with hydrates in the lunar or planetary regolith.

When cosmic rays bombard the Moon’s surface, they knock neutrons loose from the soil. As these neutrons bounce around and escape into space, they interact with hydrogen atoms, the key indicator of water (H₂O). Because hydrogen absorbs medium-energy neutrons efficiently, a deficit in these specific neutrons signals the presence of underground ice. NASA notes that the NSS detects these variations, allowing scientists to map water concentrations without needing to drill into the surface.

“A Lockheed Martin instrument, roughly the size of a desktop printer, will help future missions locate and characterize near-surface materials that could be critical to sustaining a human presence when we get there,” the company stated in its release.

The instrument was developed jointly by NASA’s Ames Research Center and Lockheed Martin’s Advanced Technology Center (ATC) in Palo Alto, California.

Meeting the Demand for Lunar Instruments

As the cadence of lunar missions accelerates, the demand for reliable resource-mapping tools has grown. To date, Lockheed Martin has delivered five NSS instruments for various lunar expeditions.

To keep pace with this demand, the company has streamlined its Manufacturing process. According to the press release, the instruments are produced exclusively at the Palo Alto facility using a “build-to-print” approach. By building exact copies of previous matured designs rather than engineering components from scratch, the team achieves significant cost savings and schedule efficiency. This process results in a fast production timeline of approximately 12 months per unit.

In addition to the 2028 LUPEX mission, NASA plans to deploy NSS instruments on other upcoming lunar rovers, including the MoonRanger micro-rover developed by Carnegie Mellon University. Together, these missions will build a comprehensive map of the Moon’s water resources.

AirPro News analysis

The Delivery of the Neutron Spectrometer System underscores a critical shift in space exploration strategy: the move toward in-situ resource utilization (ISRU). For decades, space missions have relied entirely on resources brought from Earth, a model that is financially and logistically unsustainable for permanent lunar bases or crewed missions to Mars.

By mapping exactly where water ice is located and determining its abundance, instruments like the NSS are laying the groundwork for a specialized lunar economy. If future astronauts can reliably harvest lunar ice to synthesize rocket propellant and sustain habitats, the Moon will transition from a destination into a vital staging ground for the broader exploration of our solar system.

Frequently Asked Questions

What is the LUPEX mission?

The Lunar Polar Exploration (LUPEX) mission is an uncrewed lunar lander and rover project led jointly by JAXA and ISRO. Planned to launch no earlier than 2028, it will explore the Moon’s South Pole to search for water and other resources.

How does the Neutron Spectrometer System find water?

The NSS detects water by measuring neutrons that are knocked loose from the lunar surface by cosmic rays. Since hydrogen (a primary component of water) absorbs medium-energy neutrons, the instrument can locate underground ice by detecting drops in the number of these escaping neutrons.

Sources

Sources: Lockheed Martin, NASA