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Lunar south pole

space Maturity 11-13 Next article →

The lunar south pole is the southernmost point on the Moon. It is a region of extreme geographic and thermal contrasts. Some areas experience near-constant sunlight, while others remain in total darkness. This unique environment makes the south pole a primary target for space scientists. They are searching for resources that could support human life in space. The presence of water ice in shadowed areas is a major reason for this interest.

Full Moon with south polar markings
Full Moon with south polar markings

The most important features of this region are known as cold traps. These are deep craters where sunlight can never reach the interior. Because they are permanently shaded, these craters remain incredibly cold. This temperature allows volatiles, which are substances that evaporate easily, to stay frozen. These traps act like fossil records of the early Solar System. They may contain water ice and hydrogen from comets, meteorites, or solar wind.

Shackleton Crater
Shackleton Crater

The geography of the south pole is incredibly rugged and diverse. It contains the massive South Pole–Aitken basin, a fundamental feature of the Moon. The region also features extreme heights, such as Epsilon Peak. This mountain stands at 9,050 meters, making it taller than any mountain on Earth. The landscape includes many notable craters like Shackleton, de Gerlache, Sverdrup, and Shoemaker. The south pole is located within the polar Antarctic Circle, between 80°S and 90°S.

Lunar south pole summer annotated
Lunar south pole summer annotated

Scientists have studied how light and heat move across this landscape. The Lunar Reconnaissance Orbiter (LRO) uses the Diviner Lunar Radiometer Experiment to study these properties. This tool detects reflected solar radiation and internal infrared emissions. By mapping these, scientists can find where water ice might be trapped. The surface also reflects solar wind as energetic neutral atoms. About 16% of these atoms are protons. These atoms help scientists understand the magnetic dynamics of the lunar surface.

Lunar south pole
Lunar south pole

Many international missions have attempted to explore this difficult terrain. In 2008, India's Moon Impact Probe became the first to hard land near Shackleton crater. In 2009, NASA's LRO began its long-term mapping mission. A major discovery came from the LCROSS mission, which crashed into the Cabeus crater. This mission confirmed that the crater floor contained nearly 5% water. On August 23, 2023, India's Chandrayaan-3 achieved the first soft landing near the south pole.

Chandrayaan3-landed
Chandrayaan3-landed

Recent years have seen even more activity in the region. In February 2024, the IM-1 Odysseus lander became the first US Moon landing of the 21st century. It aimed to land near the Malapert-A crater. In March 2025, the IM-2 lander arrived at Mons Mouton. While the spacecraft remained intact, it landed on its side after an altimeter failure. This caused it to slide into a crater and kick up regolith, which is lunar dust. This dust coated its solar panels and reduced their performance.

Lunar south pole geology
Lunar south pole geology

The south pole is a vital location for future human exploration. The mountain peaks near the pole receive sunlight for very long periods. These peaks could be used to collect solar energy for a lunar base. Meanwhile, the cold traps could provide the water and minerals needed for survival. An outpost at the south pole would allow scientists to study the history of our Solar System. This region connects the study of geology, chemistry, and human engineering.

Lunar south pole summer annotated
Lunar south pole summer annotated
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🖼️ Images & Media (11)
File:Shackleton Crater.jpg
Shackleton Crater.jpg
4574 LROMoonFrost MASTER.webm
File:Full Moon with south polar markings.jpg
Full Moon with south polar markings.jpg
File:Lunar south pole summer_annotated.jpg
Lunar south pole summer_annotated.jpg
Lunar South Pole Terrain in Coded Color...
Sp_illum_10deg_2025_1080p30.webm
File:Lunar south pole.jpg
Lunar south pole.jpg
File:Starry night.jpg
Starry night.jpg
File:Chandrayaan3-landed.jpg
Chandrayaan3-landed.jpg
File:Lunar south pole geology.jpg
Lunar south pole geology.jpg
File:Shackelton crater visualization.jpg
Shackelton crater visualization.jpg
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