Chandrayaan-3: India’s Historic Moon Landing

On August 23, 2023, the world watched as India did something no country had ever done before. For the first time in history, a spacecraft landed on the south pole of the Moon. Chandrayaan-3 was not just a technical achievement. Above all, it was a turning point in space history — and it cost less than making a Hollywood blockbuster.

Whether you are a student, a space fan, or simply someone curious about the fuss — this guide explains Chandrayaan-3 in plain, simple English. There is no confusing jargon here. Instead, you will get the full story of India’s lunar mission: what happened, what was found, and why the whole world is still talking about it.

What Is Chandrayaan-3?

Chandrayaan-3 is India’s third mission to the Moon. The name comes from Sanskrit — Chandra means “Moon” and Yaan means “vehicle.” So, quite simply, it means Moon vehicle.

The mission was built and launched by ISRO — the Indian Space Research Organisation. Think of ISRO as India’s version of NASA. Its main goal was to land softly on the Moon’s south pole, then study the surface using a small robot rover called Pragyan.

Why Is It Called Chandrayaan-3 and Not 1 or 2?

This is the third mission in the series. To begin with, Chandrayaan-1 (2008) was India’s first Moon mission. It orbited the Moon and, notably, confirmed the presence of water molecules in the lunar soil. Next came Chandrayaan-2 (2019), which attempted a soft landing. Unfortunately, the lander crashed during its final descent due to a software error. As a result, ISRO designed Chandrayaan-3 specifically to fix those mistakes and succeed where the previous mission fell short.

How Did Chandrayaan-3 Work? Step by Step

Space missions can sound very complicated. However, the basic idea is quite simple. Think of it like throwing a ball from one moving car to another — except both vehicles are travelling at tens of thousands of kilometres per hour.

The Three Main Parts of the Spacecraft

To understand the mission, it helps to know that Chandrayaan-3 had three main parts:

The Journey from Earth to the Moon’s Surface

• 14 July 2023 Launch — The LVM3-M4 rocket lifted off from Sriharikota, India. Total liftoff mass: 3,900 kg.
• July–August 2023 Earth orbits & Trans-lunar injection — The spacecraft circled Earth in increasingly bigger ellipses, gradually building speed before being flung toward the Moon.
• 5 August 2023 Lunar orbit insertion — Chandrayaan-3 entered the Moon’s gravitational field and began orbiting.
• 17 August 2023 Module separation — Vikram separated from the propulsion module and descended to a lower orbit.
• 23 August 2023 — 18:02 IST Powered descent & soft landing — Vikram fired its engines, slowed from 1.68 km/s to near zero, and touched down at 69.37°S, 32.35°E.
• 24 August 2023 Rover deployment — Pragyan rolled down a ramp from Vikram and began exploring the surface.
• 2 September 2023 Mission completion & sleep mode — After 14 days of lunar daylight, both Vikram and Pragyan entered sleep mode as the long lunar night began.

What Made the Landing So Difficult?

Landing on the Moon is one of the hardest things humans have ever attempted. Unlike on Earth, the Moon has no atmosphere. Therefore, you cannot use parachutes to slow down. Instead, the lander must brake entirely using rocket engines — dropping from 1,680 metres per second to almost zero in roughly 19 minutes.

Engineers call this final phase the powered descent — or more dramatically, the “18 minutes of terror.” Even a tiny software error or sensor failure can end the mission instantly.

How ISRO Fixed the Problems from Chandrayaan-2

After studying the Chandrayaan-2 crash in detail, ISRO made several key upgrades. First, the landing legs were strengthened. Furthermore, more backup sensors were added throughout the system. In addition, the safe landing zone was expanded from 500m × 500m to a much larger 4km × 2.5km. As a result of all these improvements, Chandrayaan-3 achieved a textbook-perfect landing.

Why Did India Land at the Moon’s South Pole?

This is perhaps the most important question about the mission. After all, the Moon’s equator has been explored many times. So why go all the way to the south pole?

The Secret Hidden in the South Pole’s Shadows

The lunar south pole has enormous, permanently shadowed craters. These are areas that never receive sunlight. Consequently, temperatures inside them can drop as low as −230°C. Scientists believe these frozen regions could hold ancient water ice — trapped there for billions of years.

Why Water Ice on the Moon Matters So Much

Water ice is incredibly valuable for space exploration. Specifically, it can be processed into drinking water for astronauts, oxygen to breathe, and even rocket fuel (hydrogen + oxygen). In other words, a Moon base near the south pole could “mine” the water it needs locally. This means it would not need to ship water from Earth at enormous cost. That is precisely why every major space agency — NASA, ESA, China, and Russia — is targeting this same region.

Was Water Ice Actually Found?

Chandrayaan-3 did not directly confirm large deposits of subsurface water ice. Its instruments were designed to study the surface, not dig deep. Nevertheless, Pragyan confirmed oxygen, sulfur, iron, calcium, aluminium, chromium, and titanium in the soil. Moreover, the sulfur data was a surprise — it is helping scientists understand the Moon’s geological past. Meanwhile, evidence for water ice remains strong from earlier missions, particularly Chandrayaan-1’s MINI-SAR instrument, which detected ice signatures back in 2008.

What Did Chandrayaan-3 Discover on the Moon?

Despite operating for just 14 Earth days, the mission produced remarkable scientific results. Here is a quick look at the numbers, followed by each key finding explained simply.

Scientific Findings in Plain English

Finding 1 — Sulfur on the Lunar Surface

Using its LIBS instrument (Laser-Induced Breakdown Spectroscopy), Pragyan detected sulfur at the south pole for the first time ever in situ — meaning directly on the surface, not from orbit. Scientists believe this sulfur came from ancient volcanic activity or asteroid impacts. Consequently, this data is helping researchers better understand the Moon’s deeper geological history.

Finding 2 — Extreme Temperature Difference

Vikram’s ChaSTE probe measured the Moon’s surface and subsurface temperature. At the surface, readings reached about +50°C in sunlight. Yet, just 10 cm below, the temperature plunged to around −10°C. This sharp contrast was surprising. It shows that lunar soil is a very poor conductor of heat — much like an insulating blanket covering the ground beneath.

Finding 3 — A Possible Moonquake

The ILSA instrument (Instrument for Lunar Seismic Activity) picked up a seismic event — in other words, a small moonquake — near the south pole. Notably, this was the first time such an event had been recorded in this region. Understanding moonquakes helps scientists map the Moon’s internal layers: its core, mantle, and crust.

Finding 4 — Plasma Near the Surface

Finally, Vikram’s RAMBHA-LP probe measured the density of plasma (electrically charged gas) close to the lunar surface. Near the south pole, this plasma is relatively sparse. That information is especially useful for engineers designing future lunar communications systems and electronics.

Why Does Chandrayaan-3 Matter for the World?

India Joins an Exclusive Club

Before Chandrayaan-3, only three countries had successfully soft-landed on the Moon: the United States, the Soviet Union, and China. With this mission, India became the fourth. Even more significantly, India is the first country ever to land near the lunar south pole — ahead of the USA, Russia, and China.

As a result, the global conversation about India’s space capabilities has changed completely. Today, ISRO is widely recognised as a world-class agency that delivers extraordinary results on a modest budget. Furthermore, it serves as an inspiration for space programmes in other developing nations.

The New Moon Race Has Begun

Chandrayaan-3’s success has, in turn, added urgency to several other missions. NASA’s Artemis programme aims to return humans to the Moon by 2026. Similarly, China’s Chang’e missions are advancing rapidly. In addition, the European Space Agency has accelerated its own lunar plans. As a consequence, the south pole has become the most contested destination in the solar system.

Space Exploration on a Budget

Perhaps most strikingly, the mission cost approximately USD 75 million. To put that in perspective, NASA’s GRAIL mission (just two small Moon orbiters) cost USD 496 million. Meanwhile, SpaceX’s Starship programme runs into billions. Therefore, ISRO’s ability to achieve world-class results at a fraction of the typical cost is pushing the entire industry to rethink how missions are designed and funded.

What Comes After Chandrayaan-3? India’s Future in Space

Chandrayaan-4 — Bringing Moon Rocks Back to Earth

Building on Chandrayaan-3’s success, ISRO is already developing Chandrayaan-4. This will be a lunar sample return mission. In other words, it will land on the Moon, collect soil and rock samples, and bring them back to Earth for laboratory study. So far, only the USA, the Soviet Union, and China (with Chang’e 5 in 2020) have achieved this remarkable feat.

Gaganyaan — India’s First Human Spaceflight

Chandrayaan-3’s success also gave a huge boost to India’s crewed spaceflight programme, Gaganyaan. As a next step, ISRO plans to send Indian astronauts — known as Vyomanauts — into Earth orbit. Ultimately, the long-term vision is a permanent Indian space station called Bharatiya Antariksha Station (BAS), planned for 2035.

LUPEX — A Joint India-Japan South Pole Rover

Looking further ahead, ISRO and JAXA (Japan’s space agency) are jointly developing LUPEX (Lunar Polar Exploration Mission). This rover mission is designed specifically to search for water ice in the permanently shadowed craters of the south pole. Importantly, the surface data gathered by Chandrayaan-3 is directly guiding LUPEX’s landing site selection.