INTRODUCTION
This pages show statistics about space exploration including Mars and Lunar missions.
Charts
1. Successful and Operational Mars Missions by Country and Decade
2. Successful Lunar Missions by Country
3. NASA Budget by Year in 2024 US Dollars
This chart shows successful and operational Mars missions by country and decade, highlighting the evolution of Mars exploration over time. The United States clearly dominates, with consistent activity across multiple decades and a particularly strong surge in the 2000s and 2010s. This reflects NASA’s long-term commitment to Mars exploration, including orbiters, landers, and rovers such as Spirit, Opportunity, Curiosity, and Perseverance.
The Soviet Union was active early on, especially in the 1970s, but its success was more limited and did not continue into later decades. After a quieter period in the 1980s and 1990s, Mars exploration picked up again, led overwhelmingly by the United States.
In more recent decades, new countries have entered the field. China has emerged as a major player in the 2020s, with multiple successful missions. India, the UAE, and the European Space Agency have also achieved notable successes, though on a smaller scale.
Overall, the chart shows a shift from Cold War competition to a more globalized era of space exploration, while still highlighting the United States’ clear technological lead in Mars missions.
This chart shows the distribution of successful lunar missions by country. The United States dominates with about 56.1% of all successful missions, reflecting its leading role in space exploration, particularly during the Apollo program which achieved the only human landings on the Moon. The USSR ranks second with around 27.3%, highlighting its major contributions during the early Space Race, including robotic missions such as Luna.
Together, the USA and USSR account for the vast majority of successful lunar missions, underlining how the early decades of lunar exploration were driven by Cold War competition. Both countries invested enormous resources into space programs as a demonstration of technological and ideological superiority.
More recently, newer space powers such as China and Japan have contributed a growing share of missions, though still far behind the two Cold War superpowers. China in particular has made significant advances in recent years with its Chang’e program, including lunar landings and sample return missions.
Overall, the chart reflects both the historical dominance of the USA and USSR and the gradual diversification of lunar exploration in the modern era.
This chart shows NASA’s annual budget in inflation-adjusted (2024) dollars from 1959 to 2025. The most striking feature is the dramatic peak during the mid-1960s, when funding surged to its highest levels. This period corresponds to the Apollo program, when the United States was fully committed to winning the Space Race against the Soviet Union. At its peak, NASA’s budget was several times higher than in most later decades, reflecting the enormous national priority placed on landing humans on the Moon.
After the Apollo era, funding declined sharply in the 1970s and then stabilized at a much lower level. From the 1980s onward, NASA’s budget shows moderate fluctuations but remains relatively consistent compared to the extreme highs of the 1960s. Programs such as the Space Shuttle and the International Space Station sustained funding, but without the same urgency or political backing as Apollo.
In recent years, there has been a modest increase tied to renewed lunar ambitions under programs like Artemis. However, even today, NASA’s budget remains well below its 1960s peak, highlighting how unique the Space Race era was in terms of investment and national focus.