Published: 15 November 2025PIBScience & Technology
ISRO Chandrayaan-3 Propulsion Module Returns to Moon's Sphere of Influence After Earth Orbit Mission
The Chandrayaan-3 Propulsion Module (PM), after its unprecedented return to Earth orbit in late 2023–early 2024, has successfully completed a series of orbital maneuvers and re-entered the Moon's Sphere of Influence (SOI). This development, confirmed by ISRO and reported by All India Radio, marks another milestone in extending the scientific and operational utility of the Chandrayaan-3 mission beyond its primary objectives.
Chandrayaan-3 was launched in July 2023 and achieved a historic soft-landing on the Moon's south polar region on August 23, 2023, making India the first country to land near the lunar south pole. The mission deployed the Vikram lander and Pragyan rover, which completed their objectives before entering sleep mode as lunar night began.
After depositing the Vikram lander on the Moon, the Propulsion Module was originally intended to remain in lunar orbit. However, ISRO scientists demonstrated exceptional orbital maneuvering capability by bringing the PM back to Earth orbit — an experiment to test navigation and propulsion systems in a trajectory that could inform future sample return missions.
The PM carries the SHAPE (Spectropolarimetry of Habitable Planet Earth) instrument, which has been collecting scientific data about Earth's atmosphere and characteristics from lunar distance — effectively using the Moon as a vantage point to study Earth. This data is valuable for calibrating instruments intended for future exoplanet observation missions.
The re-entry into the Moon's Sphere of Influence demonstrates ISRO's growing capability in deep space navigation, multi-body orbital mechanics, and mission extension. This precision in orbital maneuvers is crucial for future missions like Chandrayaan-4 (sample return), LUPEX (lunar polar exploration with JAXA), and the planned Gaganyaan-derived lunar missions.
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Q: ISRO's Chandrayaan-3 Propulsion Module returning to the Moon's Sphere of Influence demonstrates deep-space capability. Examine implications for future lunar and sample-return missions.
Answer (50 words):
Chandrayaan-3, launched July 2023, soft-landed near the lunar south pole on August 23, 2023 with Vikram lander and Pragyan rover. The Propulsion Module was returned to Earth orbit, then re-entered the Moon's Sphere of Influence. The SHAPE instrument observes Earth from lunar distance, informing Chandrayaan-4 sample return and LUPEX missions.
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Frequently asked questions
What is the significance of Chandrayaan-3 Propulsion Module re-entering Moon's Sphere of Influence?
It demonstrates ISRO's growing capability in deep space navigation and multi-body orbital mechanics — after an unprecedented Earth orbit experiment — extending mission utility and informing future sample return missions like Chandrayaan-4.
What instrument does the Chandrayaan-3 Propulsion Module carry and what does it study?
The PM carries the SHAPE (Spectropolarimetry of Habitable Planet Earth) instrument, which studies Earth's atmosphere and characteristics from lunar distance, using the Moon as a vantage point to gather data for future exoplanet observation missions.
Why was bringing the Propulsion Module back to Earth orbit significant?
It was an unprecedented navigation experiment testing propulsion and guidance systems in a complex multi-body trajectory (Earth-Moon), demonstrating capabilities essential for future sample return and long-duration deep space missions.
What historic achievement did Chandrayaan-3 accomplish in August 2023?
On August 23, 2023, Chandrayaan-3 achieved India's first soft-landing on the Moon's south polar region, making India the first country to land near the lunar south pole.
Why is this relevant for RAS/UPSC exams?
It covers ISRO mission architecture, India's space program achievements, deep space navigation, orbital mechanics, and India's international space collaboration (LUPEX with JAXA) — key topics in Science & Technology paper.
