why no manned moon mission was conducted since 1973

From 1973 till 2025 (more than 50 years), no manned mission was sent to moon. After the Apollo program, which concluded with the Apollo 17 mission in 1972, no further manned missions were conducted to the moon for several reasons:

1. Cost: The Apollo program was a significant financial investment for the United States. The missions required a substantial portion of NASA's budget, and as public interest waned and budget priorities shifted, funding for future manned lunar missions became more challenging to secure.

2. Diminished Public Interest: The Apollo program's main objective was to demonstrate American technological and ideological superiority during the Cold War. After successfully landing on the moon multiple times, the initial enthusiasm and motivation waned, leading to a decrease in public and political support for further missions.

3. Technological Challenges: While the Apollo program achieved its goal of landing humans on the moon, the technology of the time had limitations. There were challenges with life support, radiation protection, and long-duration space travel. Overcoming these challenges for sustained lunar missions would have required significant advancements in technology.

4. Focus on Other Priorities: In the decades following the Apollo program, NASA shifted its focus to other areas of space exploration, such as the Space Shuttle program, space station projects like Skylab and the International Space Station (ISS), and robotic missions to other planets and celestial bodies.

5. International Cooperation: In recent years, there has been a growing emphasis on international cooperation in space exploration. Instead of individual nations embarking on separate missions, there has been a push to collaborate on large-scale projects, like the ISS. This collaborative approach has influenced priorities and resources allocation.

6. Robotic Exploration: Advancements in robotics have enabled space agencies to conduct a variety of scientific missions to the moon and other celestial bodies without the need for human presence. Robotic missions are often more cost-effective and allow for in-depth scientific exploration.

7. Private Sector Involvement: The emergence of private space companies, such as SpaceX, Blue Origin, and others, has introduced new dynamics to space exploration. These companies are focused on different objectives, such as Mars exploration and commercial space travel, which has diverted attention and resources from manned lunar missions.