Ice Beneath the Moon
India’s Chandrayaan-2 orbiter uncovers compelling evidence of buried water-ice near the lunar South Pole — a find that could reshape humanity’s future in space.
In a landmark finding announced in late May 2026, scientists from India’s Physical Research Laboratory (PRL) in Ahmedabad, working with data from ISRO’s Chandrayaan-2 orbiter, have identified some of the strongest evidence yet for subsurface water-ice deposits hidden beneath craters near the Moon’s South Pole. The study, published in the journal npj Planetary Science, signals a major step forward in our understanding of the Moon’s frozen interior.
The discovery centres on a special class of terrain known as “doubly shadowed craters” — depressions nestled within larger permanently shadowed regions (PSRs) that receive neither direct sunlight nor indirect thermal radiation. Temperatures inside these craters plunge to around –248 °C (25 Kelvin), making them among the coldest known places in the entire Solar System. At such extremes, water-ice can survive intact for billions of years.
“These doubly shadowed craters are time capsules — natural deep-freezers that may have preserved ancient water-ice since the earliest days of the Solar System.”
How the Discovery Was Made
The research team analysed data from Chandrayaan-2’s Dual Frequency Synthetic Aperture Radar (DFSAR) — the first fully polarimetric synthetic aperture radar ever deployed on a lunar mission. This sophisticated microwave imaging instrument can peer beneath the lunar surface, allowing scientists to detect buried material invisible to optical cameras.
Using advanced radar polarimetric analysis, the scientists identified ice-consistent signatures beneath four doubly shadowed craters near the South Pole. One crater in particular — a 1.1-kilometre-wide depression located inside the larger Faustini crater basin — showed especially compelling evidence. It displayed both strong radar backscatter signals and distinctive “lobate-rim morphology,” a flow-like structural feature suggesting that a past impact may have punched through an ice-rich subsurface layer, disturbing and deforming it.
Key Facts at a Glance
- Instrument used: DFSAR (Dual Frequency Synthetic Aperture Radar) aboard Chandrayaan-2 orbiter
- Location: Doubly shadowed craters within Faustini crater, lunar South Pole
- Temperature: Approximately –248 °C (25 K) — cold enough to preserve ice for billions of years
- Evidence found: Radar backscatter signatures + lobate-rim crater morphology consistent with buried ice
- Research institutions: Physical Research Laboratory (PRL), Ahmedabad & ISRO
- Published in: npj Planetary Science, May 2026
Why This Matters: Future Benefits
Water-ice on the Moon is far more than a scientific curiosity. If confirmed and accessible in meaningful quantities, it could become one of the most strategically valuable resources in the history of space exploration. Here is why:
Drinking Water
Extracted and purified, lunar ice could supply drinking water to future astronaut crews, drastically reducing what must be launched from Earth.
Breathable Oxygen
Electrolysis can split water molecules into hydrogen and oxygen, providing a local source of breathable air for habitats and space stations.
Rocket Propellant
Liquid hydrogen and oxygen — derived from water — are among the most powerful rocket propellants, enabling refuelling depots on the Moon for missions to Mars and beyond.
Permanent Lunar Bases
A local water supply makes sustained human habitation on the Moon economically feasible, potentially turning the South Pole into humanity’s first off-world settlement.
Deep-Space Gateway
The Moon could serve as a cosmic fuel stop — a staging point that dramatically lowers the cost and complexity of crewed missions to the outer Solar System.
India’s Strategic Milestone
The discovery reinforces India’s growing role in lunar science, positioning ISRO and Indian researchers at the forefront of the global race to understand and utilise the Moon.
Looking Ahead
This discovery adds powerful momentum to the international push towards the lunar South Pole. Space agencies including NASA, ESA, JAXA, and CNSA are all targeting this region for future missions. Notably, NASA’s Artemis programme and India’s own upcoming missions are expected to examine these ice-bearing regions in far greater detail, potentially deploying robotic drilling systems to sample and study the deposits directly.
Chandrayaan-2’s orbiter, which has been silently circling the Moon since 2019 after its lander was lost during descent, continues to produce groundbreaking science — a quiet testament to the enduring value of persistence in space exploration. Its latest revelation may well be remembered as one of the most consequential lunar findings of the 21st century.
The Moon is no longer just a destination — it may soon be the first step on a much longer journey outward through the Solar System.
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