NASA Continues Its Journey Back To The Moon And Is Eager To Embark On A New Deep Space Exploration Voyage To Mars

The successful launch of Artemis II has given NASA a strong boost to its lunar exploration efforts and laid a solid foundation for Mars exploration. This mission, carrying a diverse crew of four astronauts, will conduct a 10-day lunar exploration mission. Its core objective is not a lunar landing, but rather to comprehensively verify the reliability of the Orion spacecraft's performance in deep space. According to NASA, during the mission, the astronauts will complete several key tasks, including testing the deep space life support system, verifying long-distance Earth-Moon communication and navigation, and evaluating the reentry thermal protection system. The extreme high-temperature test of 2700°C that the spacecraft will withstand upon returning to Earth will accumulate valuable technical data for manned Mars exploration. It's important to note that the environmental complexity of reentry into the Martian atmosphere during a manned Mars mission far exceeds that of the Moon, and the thermal protection technology verified in this test will be directly applied to the design and development of Mars spacecraft.

As a core component of NASA's "Lunar to Mars" evolutionary architecture, the ultimate goal of the Artemis program has never been merely returning to the Moon, but rather establishing the Moon as a "transfer station" and "testing ground" for humanity's journey to Mars. According to the plan, NASA will achieve a manned landing on the lunar south pole in 2027 through the Artemis III mission, and establish a long-term base there by 2030, gradually realizing the goal of "returning to the moon and establishing a long-term residence." The lunar south pole has become a key area of ​​exploration due to its unique resource advantages: it contains permanently shadowed regions, which scientists speculate contain abundant water ice resources. Water ice can be broken down into hydrogen and oxygen, which can meet the survival needs of astronauts and also serve as rocket fuel, providing on-orbit resupply for Mars missions, significantly reducing the cost and difficulty of Mars exploration. "We are returning to the moon not to repeat the glory of the Apollo era, but to pave the way to Mars," NASA Administrator Bill Nelson clearly stated at the Artemis II launch ceremony. Lunar exploration is a "warm-up" for the Mars mission; every technological breakthrough and every accumulation of experience paves the way for a human landing on Mars.

Compared to the "steady progress" of lunar exploration, NASA's "eagerness" for Mars exploration is particularly prominent. From the very beginning of the Artemis program, NASA clearly stated its goal of achieving the first manned landing on Mars in the 2030s, with a possible round-trip mission as early as 2035. According to publicly available plans, a manned Mars mission could cover a distance of up to 250 million miles one way, with a flight time of 6 to 7 months. Astronauts would stay on the Martian surface for up to 500 days before returning to Earth, making the entire mission cycle over two years. This presents unprecedented challenges in space technology, life support, and logistical support. Even so, NASA continues to accelerate preparations without slowing down.

NASA's eagerness to land on Mars stems from multiple drivers: scientific exploration, technological breakthroughs, and strategic competition. From a scientific perspective, Mars is the most Earth-like planet in the solar system and currently the only known planet that may have once harbored life. Billions of years ago, Mars possessed a thick atmosphere and abundant liquid water, remarkably similar to Earth's environment. Today, however, Mars is a dry, barren red planet. Its environmental evolution provides crucial insights into Earth's past and future. NASA's "Science Analysis Group for Human Exploration of Mars" clearly states that the core scientific objectives of Mars exploration include: searching for evidence of past life on Mars, revealing the reasons for the deterioration of the Martian environment, studying the geological and atmospheric characteristics of Mars, and providing scientific evidence for future human interstellar migration. "Mars is like a 'mirror image' of Earth. Unraveling the mysteries of Mars will allow us to better protect our home," said Joel S. Levine, co-chair of the group. He added that robotic exploration can only acquire limited data about Mars; only a human landing on Mars can conduct in-depth scientific research and unlock the ultimate mysteries of the formation of the solar system and the origin of life.

Technically, Mars exploration is far more challenging than lunar exploration, and this challenge is precisely what drives NASA's innovation in space technology. Compared to the Moon, Mars is much farther from Earth, ranging from approximately 33 million miles at its closest point to 249 million miles at its farthest. This means that communication between Earth and Mars can have a delay of more than 20 minutes, preventing astronauts from receiving real-time commands from the ground and requiring them to have the ability to autonomously respond to emergencies. Meanwhile, Mars presents an extremely harsh environment: surface temperatures range from -284 degrees Fahrenheit to 86 degrees Fahrenheit, with extreme diurnal temperature variations; its atmosphere is 96% carbon dioxide, making it unsuitable for direct human respiration; periodic dust storms can last for months, posing a serious threat to equipment operation and astronaut safety; and Mars' gravity is only one-third that of Earth, meaning prolonged exposure to this environment could cause irreversible damage to astronauts' bones, muscles, and cardiovascular system.

To address these challenges, NASA is pushing forward with the development of six core technologies: reliable propulsion systems, efficient life support systems, durable Martian habitation modules, safe reentry technologies, stable energy supplies, and precise navigation and communication systems. Among these, the Mars Oxygen In-Situ Resource Utilization Experiment (MOXIE) has achieved a major breakthrough. This technology can extract oxygen from the Martian atmosphere to support astronaut breathing and rocket fuel, and has been successfully validated on the Perseverance rover. Regarding energy supply, NASA has abandoned the traditional reliance on solar energy and is instead developing a nuclear fission propulsion system to address the impact of Martian dust storms on energy supply, ensuring a stable energy supply for equipment and astronauts. In addition, NASA is conducting long-term stay experiments on the International Space Station, studying the effects of microgravity on the human body, and developing recyclable food, water, and air systems to prepare for long-term Mars missions-after all, manned Mars missions cannot receive frequent resupply like low-Earth orbit missions and must achieve self-sufficiency.

Strategic competition is another important driving force behind NASA's eagerness to land on Mars. In recent years, global deep space exploration has entered an era of rapid development, with countries and regions such as China, Europe, and India increasing their space investment, making competition in the field of Mars exploration increasingly fierce. China's Tianwen series of Mars exploration missions have successfully achieved Mars orbit, landing, and roving, and plan to carry out a Mars sample return mission in the future; the European Space Agency's Mars exploration project in cooperation with Russia is also progressing steadily, with the goal of exploring for life on Mars. Against this backdrop, NASA, as the "leader" in the global space industry, is eager to consolidate its dominant position in deep space exploration and maintain American space hegemony through a manned Mars landing.

It's worth noting that NASA's "dual-track exploration" strategy has not been without its challenges, especially under the dual pressures of budget adjustments and technological bottlenecks, leading to considerable controversy surrounding its Mars exploration program. In 2025, the Trump administration's fiscal year 2026 budget proposal cut NASA's budget by 25%, from $24.8 billion to $18.8 billion-the largest annual budget cut in NASA's history. Simultaneously, while $1 billion was specifically allocated to the Mars exploration program, NASA was forced to cut funding for other projects, including canceling the Mars sample return mission, scaling back research on the International Space Station, closing some expensive research projects, and even phasing out the costly SLS Heavy rocket and Orion spacecraft, relying instead on technological support from commercial space companies like SpaceX.

The budget cuts have drawn widespread criticism. Kathy Delier, director of space policy at the Planetary Society, pointed out that this approach of "sacrificing other scientific projects for a Mars mission" will cause long-term damage to America's space competitiveness. On the one hand, significant budget cuts in fundamental research fields such as planetary science and astrophysics, and the potential cancellation of several major telescope projects, will slow down humanity's understanding of the solar system and the universe. On the other hand, the early retirement of the SLS rocket and the Orion spacecraft may disrupt the pace of lunar exploration and affect the preliminary preparations for Mars missions-after all, the Moon serves as a "transfer station" for Mars exploration, and the construction of its base and technology verification rely heavily on the support of these core facilities. Furthermore, budget cuts may lead to a brain drain in the aerospace field. Due to fewer research projects and lower job requirements, many scientists and engineers may turn to other areas due to a lack of development opportunities, further weakening NASA's technological research and development capabilities.

Technological bottlenecks are equally significant. Although NASA has made some breakthroughs in Mars exploration technology, many challenges remain unresolved. For example, the propulsion system for the Mars manned spacecraft is still under development. Current rocket technology cannot achieve rapid Earth-Mars transfer, and the long flight time not only increases the health risks for astronauts but also raises the probability of mission failure. Radiation protection technology on the Martian surface is not yet fully mature; long-term exposure to Martian radiation could lead to serious diseases such as cancer in astronauts. Furthermore, the development of Martian habitation modules also faces challenges, requiring a balance of safety, comfort, and practicality, and the ability to withstand the extreme Martian environment and dust storms.

Besides budget and technical issues, NASA's Mars exploration program also faces ethical and safety controversies. Some scientists worry that a human landing on Mars could carry Earth microorganisms, polluting the pristine Martian environment and hindering the search for life on Mars. At the same time, the Mars mission is extremely risky; in the event of an accident, astronauts would not be able to receive timely rescue, posing a significant threat to their lives. In addition, the enormous investment in Mars exploration has also drawn public criticism. Some argue that given Earth's numerous problems such as climate change and environmental pollution, investing heavily in Mars exploration would be less beneficial than using the funds to solve Earth's existing problems.

Despite numerous challenges, NASA has not halted its Mars exploration efforts. Instead, it has further strengthened international and commercial cooperation, attempting to leverage the strengths of multiple parties to advance the Mars mission. In terms of international cooperation, NASA has partnered with space agencies in Canada, Europe, Japan, and other countries and regions to jointly advance Mars exploration projects. For example, astronauts from the Canadian Space Agency participated in the Artemis II mission, accumulating experience for subsequent international cooperation on Mars missions. Regarding commercial cooperation, NASA is increasingly reliant on commercial space companies like SpaceX, whose Starship rocket is more powerful and less expensive than the SLS rocket, and is expected to become the core launch vehicle for manned Mars missions. Simultaneously, NASA encourages commercial space companies to participate in the development of Mars exploration technologies through "fixed-price contracts," reducing project costs and improving development efficiency.

From the Apollo program to the Artemis program, from lunar exploration to Mars exploration, NASA's path of deep space exploration has always been fraught with challenges and controversies, but humanity's exploration of the universe has never ceased. The Moon, as humanity's "first stop" in deep space exploration, carries the important mission of technological verification and resource accumulation; while Mars, as humanity's potential "second home," embodies the beautiful vision of expanding living space and exploring the mysteries of life. NASA's simultaneous advancement of lunar missions and its urgent deployment of Mars exploration essentially reflects its "Moon to Mars" evolutionary strategy. Through a gradual approach, it aims to overcome the technological bottlenecks of deep space exploration and achieve a leapfrog development in human interstellar exploration.

Currently, the Artemis II mission is progressing as planned and is expected to splash down in the Pacific Ocean on April 10th. The success of this mission will lay a solid foundation for the Artemis III manned lunar landing mission. Meanwhile, preparations for Mars exploration are also underway. NASA plans to complete all technological verifications for a manned Mars mission by 2030 and achieve the first manned landing on Mars around 2035. Despite the unknowns and challenges ahead, as NASA states in its Mars exploration strategy, "Space is a temple of innovation and discovery, a place where humanity reflects on its place in the universe."

Whether returning to the Moon or heading to Mars, NASA's exploration missions are not merely national space achievements, but a collective effort by all humanity to explore the universe. As Artemis II crew commander Reed Wiseman said, "We are not exploring for one nation, but for the future of all mankind." In the future, with continuous technological advancements and deepening international cooperation, humanity will eventually set foot on Mars, unveil the mysteries of this red planet, and usher in a new era of deep space exploration. NASA's "dual-track exploration" strategy will also provide valuable experience and lessons for human interstellar exploration, propelling humanity step by step into the more distant depths of the universe.

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