The primary objective of the Chandrayaan-1 mission was to study the lunar surface and its composition, including the presence of water and other elements.

The Chandrayaan-1 mission was launched on October 22, 2008, from the Satish Dhawan Space Centre in Sriharikota, India.

The Chandrayaan-1 mission lasted for 10 months, from its launch on October 22, 2008, to its impact on the Moon on August 29, 2009.

The Chandrayaan-1 mission made several key findings, including the presence of water on the Moon, the discovery of new minerals, and the confirmation of the existence of a lunar atmosphere.

The lunar rover that was deployed by the Chandrayaan-1 mission was called the Moon Impact Probe.

The primary objective of the Chandrayaan-2 mission was to deploy a rover on the Moon, called the Pragyan rover.

The Chandrayaan-2 mission was launched on July 22, 2019, from the Satish Dhawan Space Centre in Sriharikota, India.

The Pragyan rover lost contact with the orbiter shortly after it was deployed on the Moon, and its status is currently unknown.

The Chandrayaan-2 mission did not make any major scientific discoveries, as the Pragyan rover was unable to successfully complete its mission.

India has ambitious plans for its future lunar exploration program, including launching a new lunar mission in 2023, establishing a permanent human base on the Moon by 2030, and sending a crewed mission to the Moon by 2025.

India's Chandrayaan missions have had a significant impact on our understanding of the Moon, demonstrated India's growing space capabilities, and inspired a new generation of scientists and engineers.

The Chandrayaan missions are comparable to other lunar exploration missions in terms of their ambition, cost, and success rate.

India's lunar exploration program faces a number of challenges, including the high cost of lunar missions, the technical challenges of operating in a harsh lunar environment, and the lack of international cooperation in lunar exploration.

Lunar exploration is likely to continue to be a major focus of space agencies around the world, as well as becoming increasingly commercialized. Eventually, lunar exploration may be replaced by Mars exploration, but this is still a long way off.