Top Highlights
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Collaboration for Lunar Exploration: NASA is partnering with JAXA and ISRO on the LUPEX mission to search for ice on the Moon, utilizing its Neutron Spectrometer System (NSS) to detect water beneath the lunar surface.
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Water’s Importance: Finding water on the Moon is essential for establishing a sustainable human presence, providing resources for breathable air, rocket fuel, and other needs without reliance on Earth.
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Understanding Lunar Ice: The NSS will help fill the knowledge gap regarding the distribution and quantity of lunar ice, critical for planning future astronaut landing sites.
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Multiple Missions: The NSS instrument will feature in several upcoming lunar missions, including NASA’s VIPER mission and Carnegie Mellon’s MoonRanger rover, to better identify potential ice deposits for exploration.
NASA’s Water-Hunting Tool Will Scout Moon’s South Pole
NASA is partnering with international agencies to find ice on the Moon. This effort supports future human exploration. The space agency will provide a water-detecting tool known as the Neutron Spectrometer System (NSS) for the Lunar Polar Exploration (LUPEX) mission. This mission is led by Japan’s space agency, JAXA, and India’s ISRO.
The NSS will be attached to a lunar rover expected to land on the Moon no earlier than 2028. Scientists aim to identify deposits of water at the Moon’s South Pole. Water is essential for NASA’s plans to establish a long-term human presence. Instead of relying on resources transported from Earth, astronauts can use lunar water for air and rocket fuel.
Understanding where water lies is crucial. Water mostly exists as molecules in lunar regolith—the Moon’s dusty surface. However, potential ice deposits may lie beneath. With more knowledge about water’s quantity and quality, scientists can devise ways to utilize it for exploration.
Rick Elphic, NSS lead at NASA’s Ames Research Center, highlights a gap in understanding lunar ice distribution. He states that analyzing small scales, from centimeters to kilometers, is vital. Ground missions will help scientists build a clearer picture of where ice is located.
NASA’s NSS finds water without drilling. Instead, it detects hydrogen, a key part of water (H₂O). Previous missions identified clues of water at the Moon’s poles, but ground exploration is necessary to create detailed maps.
The NSS uses neutrons to locate hydrogen. Neutrons, which exist in lunar soil, interact with hydrogen, leading to fewer ejected medium-energy neutrons. This pattern indicates where hydrogen and potentially water may be located. The NSS employs a gas counter containing helium-3, which is sensitive to neutrons. When neutrons collide with helium-3, they create electrical pulses, allowing scientists to determine hydrogen presence up to three feet underground.
Future missions will expand on this approach. NASA has developed a series of NSS instruments for various lunar explorations. The first NSS was part of Astrobotic’s Peregrine lander mission, launched in January 2024. While the mission did not land, the instrument gathered valuable data about deep space.
Additionally, NASA’s VIPER rover will also carry an NSS. A fourth NSS will accompany the MoonRanger “micro rover” developed by Carnegie Mellon University. These missions will help scientists identify the best locations for exploring lunar ice.
As researchers gather data from these expeditions, they will better understand where ice may exist. Consequently, scientists can plan missions to target promising locations for future human exploration on the Moon. This mission not only enhances our understanding of lunar resources but also showcases the technological advancements important for future space exploration.
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