Chandrayaan-3 has revealed that the Moon’s south polar region is chemically rich, geologically ancient, seismically active, and likely more favorable for storing water ice than scientists previously thought.

Big discoveries in simple terms

  • Sulfur at the south pole (a first):
    • Pragyan rover directly confirmed sulfur in the lunar south polar soil using its LIBS and APXS instruments.
* This is the first in-situ detection of sulfur in this region by any mission, helping scientists understand how the surface formed and altered over time.
  • Many other elements in the soil :
    • Chandrayaan-3 detected aluminum, calcium, iron, chromium, titanium, manganese, silicon, and oxygen in the regolith near the landing site.
* These measurements give a detailed chemical “fingerprint” of the south pole terrain, crucial for future in-situ resource use like building materials or oxygen extraction.
  • Evidence of an ancient magma ocean :
    • Data from the south polar soil showed a strong presence of ferroan anorthosite, a very old rock type that forms when a global magma ocean cools and solidifies.
* This supports long-standing theories that the young Moon once had a global molten layer, with lighter minerals floating up to form the early crust.
  • Primitive mantle material exposed :
    • At the Shiv Shakti Point landing site, scientists found an unusual elemental mix: low sodium and potassium but enriched sulfur, pointing to primitive mantle material from deep inside the Moon.
* This material was likely excavated by the massive South Pole–Aitken impact over 4.3 billion years ago, giving a rare direct window into the Moon’s deep interior.
  • Discovery of a huge buried crater (~160 km) :
    • Imaging from Pragyan and the Chandrayaan‑2 orbiter revealed that Chandrayaan‑3 actually landed within a buried impact crater about 160 km wide and roughly 4.4 km deep.
* This crater may even be older than the huge South Pole–Aitken Basin, which makes it a key piece of the Moon’s early impact history.
  • Moonquakes and internal activity :
    • The Vikram lander’s seismometer recorded natural moonquakes in the south polar region, something not measured there since the Apollo era.
* These tremors provide clues about the Moon’s internal structure and ongoing tectonic-like activity.
  • Thermal data and water-ice potential :
    • Chandrayaan‑3’s ChaSTE instrument measured how temperature changes with depth in the south polar soil.
* In March 2025, scientists reported that sloping regions (greater than about 14 degrees) near the south pole can stay cold enough below the surface to keep water ice stable even outside permanently shadowed craters, suggesting more favorable spots for ice than previously mapped.
  • Space weathering and ancient rocks :
    • Pragyan inspected rock fragments along its traverse and found heavily weathered surfaces rich in iron, aluminum, magnesium, calcium, and titanium.
* One large fragment is thought to be ejecta from a very ancient impact, helping reconstruct how bombardment shaped the Moon’s crust over billions of years.
  • Age of the landing site (Shiv Shakti Point) :
    • ISRO dated the landing region to roughly 3.7 billion years old using crater analysis.
* That age coincides with the era when early life was emerging on Earth, making the site important for comparing Earth–Moon histories.

Mini sections for quick reading

Why sulfur and other elements matter

  • Sulfur can help trace volcanic and impact processes and may be useful for future in-situ resource utilization.
  • The full elemental mix (Fe, Ti, Al, Ca, etc.) helps classify rock types, refine models of crust formation, and pick sites for future landers and bases.

What this says about water and future bases

  • Very cold subsurface temperatures on certain south polar slopes mean water ice can remain stable in more places than just permanently shadowed craters.
  • That increases optimism that future human or robotic missions could mine water for drinking, oxygen, and rocket fuel, especially in this region.

What did Chandrayaan‑3 “prove” about the Moon?

  • The Moon’s south pole is:
    • Chemically diverse, not a bland, uniform desert.
* Geologically complex, with buried giant craters and very ancient rocks.

* Still dynamically active internally, as shown by moonquakes and plasma measurements.
  • It strongly backs the idea of an early global magma ocean and exposes deep mantle material at the surface.

In story form: Chandrayaan‑3 went to one of the harshest, least-understood places on the Moon and found ancient deep-interior rocks, traces of a long- vanished magma ocean, a hidden giant crater, and signs that water ice may be easier to preserve there than we thought—turning the south pole from a mystery into one of the most promising destinations for future explorers.

Information gathered from public forums or data available on the internet and portrayed here.