Chandrayaan-2

Chandrayaan-2 was the second lunar mission of the Indian Space Research Organisation (ISRO), conceived as a successor to Chandrayaan-1 (2008) and approved by the Government of India in September 2008. Its legal and institutional basis rests with ISRO, which functions under the Department of Space, a department answerable directly to the Prime Minister of India and governed by the Space Commission established in 1972. The mission was originally planned as a joint venture with the Russian space agency Roscosmos, which was to supply the lander; after Russia withdrew following the loss of its Phobos-Grunt probe in 2011, India elected to develop an indigenous lander, transforming Chandrayaan-2 into a wholly domestic three-component spacecraft. This decision aligned with India's broader posture of self-reliance in strategic technologies and made the mission a frequently cited example of indigenous capability in UPSC General Studies Paper III, which covers science and technology developments and their applications.

The mission architecture comprised three integrated modules: an orbiter designed for a year-long survey of the lunar surface from a polar orbit, the Vikram lander (named after Vikram Sarabhai, the founder of the Indian space programme), and the Pragyan rover ("Pragyan" meaning wisdom in Sanskrit), a six-wheeled solar-powered vehicle housed within Vikram. Chandrayaan-2 was launched on 22 July 2019 from the Satish Dhawan Space Centre at Sriharikota aboard the GSLV Mk III-M1, India's most powerful launch vehicle. Rather than a direct trans-lunar injection, the spacecraft used a series of Earth-bound orbit-raising manoeuvres exploiting the Oberth effect to conserve propellant, followed by trans-lunar insertion and lunar-bound orbit insertion on 20 August 2019. Vikram separated from the orbiter on 2 September 2019 to begin its independent descent toward a high-latitude site near the lunar south pole.

The descent sequence was the mission's most demanding phase. Vikram executed a rough-braking phase, a fine-braking phase, and a planned soft touchdown intended for 7 September 2019. During the fine-braking phase, the lander deviated from its planned trajectory and lost communication with ground control at an altitude of roughly 2.1 kilometres above the surface. The orbiter, by contrast, was inserted successfully and carries eight scientific instruments, including a high-resolution camera, a synthetic aperture radar, an imaging infrared spectrometer, and a soft X-ray spectrometer, with a designed mission life later extended on account of the precise launch leaving surplus propellant. The orbiter's instruments have confirmed the presence of water-ice signatures and mapped lunar mineralogy and the tenuous exosphere.

The targeted landing zone, a high plain between the craters Manzinus C and Simpelius N at approximately 70 degrees south latitude, would have made India the first nation to land near the lunar south pole and the fourth to achieve a soft lunar landing after the Soviet Union, the United States, and China. Following the loss of Vikram, ISRO chairman K. Sivan and the agency conducted a failure analysis, attributing the crash to a deviation during the powered descent compounded by software and braking-thrust factors. The lessons informed Chandrayaan-3, which ISRO launched on 14 July 2023 and which successfully soft-landed its Vikram lander and deployed the Pragyan rover near the south pole on 23 August 2023, making India the fourth country to achieve a lunar soft landing and the first at that polar region.

Chandrayaan-2 must be distinguished from its predecessor and successor. Chandrayaan-1 was an orbiter-and-impactor mission whose Moon Impact Probe deliberately struck the surface in 2008 and which produced the first conclusive evidence of lunar water; it carried no soft-landing ambition. Chandrayaan-3, by deliberate design, omitted an orbiter entirely and reused the still-functional Chandrayaan-2 orbiter for communications relay, concentrating engineering effort and redundancy on the lander and rover. Chandrayaan-2 therefore occupies the pivotal middle position: it demonstrated India's launch and orbital insertion competence while exposing the precise descent-control deficiencies that the third mission corrected. It should not be confused with the Mars Orbiter Mission (Mangalyaan, 2013), India's interplanetary debut, which was an orbiter-only mission to a different body.

The mission generated controversy and debate over how ISRO characterised the outcome. Although the lander failed, the agency and government emphasised that roughly 90 to 95 percent of mission objectives—chiefly the orbiter's science programme—remained intact, prompting discussion about how partial success in high-risk exploration should be communicated. NASA's Lunar Reconnaissance Orbiter later imaged the Vikram impact site and credited a crowd-sourced contributor with identifying debris, an episode that underscored the collaborative and transparent nature of contemporary lunar reconnaissance. The orbiter continues to operate and relay data, and its long operational life materially enabled the architecture of Chandrayaan-3.

For the working practitioner—the civil services aspirant, the science-policy analyst, or the desk officer tracking the Indo-Pacific space domain—Chandrayaan-2 is a compact case study in technological self-reliance, risk management, and iterative engineering under budgetary discipline; the mission cost roughly 978 crore rupees. It illustrates how a frank failure analysis can be converted into a subsequent success, a narrative central to GS3 questions on indigenisation and achievements of Indians in science. It also signals India's strategic intent in cislunar space, relevant to the geopolitics of the Outer Space Treaty regime and the emerging contest over lunar resources at the south pole.