Chandrayaan-3
Chandrayaan-3 successfully soft-landed the Vikram lander in the high southern lunar latitudes and deployed the Pragyan rover.
The mission in three questions
- Could India demonstrate a complete soft landing after Chandrayaan-2's landing loss?
- What are the thermal, plasma and seismic conditions at the landing site?
- What elements are present in the local high-southern-latitude regolith and rocks?
Mission purpose and context
Chandrayaan-3 was built around a focused engineering objective: demonstrate a safe soft landing and rover operations after the Chandrayaan-2 landing attempt. It succeeded on 23 August 2023 in the lunar southern high latitudes.
Spacecraft and mission architecture
The mission comprised a propulsion module, the Vikram lander and the Pragyan rover. The propulsion module carried the lander from Earth transfer into lunar orbit, while Vikram handled powered descent and deployed Pragyan after touchdown.
Payload and measurement highlights
- Vikram's ChaSTE measured near-surface thermal properties.
- ILSA recorded local seismic activity and RAMBHA-LP measured the near-surface plasma environment.
- Pragyan carried LIBS and APXS instruments for elemental measurements of rocks and regolith.
- A laser retroreflector array supports ranging experiments; the propulsion module carried the SHAPE Earth-observation experiment.
How this mission collected evidence
| Instrument | Measurement | Scientific connection |
|---|---|---|
| ChaSTE Chandra's Surface Thermophysical Experiment | Near-surface temperature profile | Local thermophysical properties at the landing site |
| ILSA Instrument for Lunar Seismic Activity | Local vibrations and seismic events | Lunar seismic environment near the landing site |
| RAMBHA-LP Langmuir Probe | Near-surface plasma density and variation | Surface plasma environment |
| APXS Alpha Particle X-ray Spectrometer | Elemental composition of rocks and regolith | Local surface chemistry |
| LIBS Laser Induced Breakdown Spectroscope | Elemental composition through laser-produced plasma | In-situ regolith chemistry |
Browse the lunar mission instrument reference.
Flight and surface operations
Vikram landed near 69° south latitude. Pragyan drove on the surface during the local daylight period while lander and rover instruments operated. Both were placed into sleep as lunar night approached; they did not resume surface operations after sunrise. The propulsion module continued in space and was later moved to an Earth orbit during an extended experiment.
Mission sequence
- 14 July 2023: launched the propulsion module, Vikram lander and Pragyan rover.
- 23 August: Vikram achieved a controlled landing at high southern latitude and deployed Pragyan.
- The lander and rover operated through their planned sunlit surface period and entered sleep as local night approached.
Science and measurements
Vikram measured near-surface plasma, thermal properties and seismic signals. Pragyan used alpha-particle X-ray spectroscopy and laser-induced breakdown spectroscopy to measure local elemental composition. ISRO reported in-situ detection of elements including sulphur at the landing region.
What changed because of this mission
Chandrayaan-3 demonstrated India's complete lunar landing-and-rover chain and supplied the first in-situ measurements from its specific high-southern-latitude site. It should not be described as landing at the lunar south pole itself; the site is hundreds of kilometres from the pole.
Mission outcome
The mission demonstrated India's lunar soft-landing and rover capability and returned in-situ measurements of the local surface environment and composition.
The outcome should be read against the mission's actual objectives and architecture. Multi-element missions can have different results for an orbiter, lander, rover or sample-return stage, while a shortened mission can still return important science or demonstrate a critical technology.
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Primary reference
ISRO - Chandrayaan-3. Chandrayaan-3 lander and rover mission.