Overview
- The 50th anniversary on Monday, July 20, 2026, marks Viking 1’s historic July 20, 1976, landing and the mission’s six years of surface work that returned more than 52,000 images.
- NASA’s ESCAPADE twin orbiters, launched in November 2025, are on course to reach Mars in 2027 to study how the solar wind strips the atmosphere and to improve models of atmospheric loss.
- India’s ISRO is advancing plans for Mangalyaan-2, aiming for a soft landing around 2030, while existing missions such as the UAE’s Hope and China’s Tianwen-1 have supplied operational lessons about atmosphere and dust effects.
- Mars’ harsh environment — a thin CO2 atmosphere, large temperature swings, low gravity and planet-wide dust that can blind solar panels — repeatedly shapes power and landing choices and likely favors nuclear power for long-duration surface work.
- Experts say no single technical barrier prevents human missions but point to a lack of detailed plans, insufficient funding and unresolved legal and economic questions about property rights and private financing as the main obstacles.