As the cornerstone of multinational space cooperation, the International Space Station (ISS) has undergone decades of expansion since the docking of Russia’s Zarya module and the U.S. Unity node in 1998. With the addition of Russia’s Nauka laboratory and the Prichal node in 2021, the ISS has become a complex structure integrating technologies from multiple nations, including NASA, Roscosmos, ESA, and JAXA.

However, as the ISS faces pressure regarding its decommissioning, U.S. interstellar exploration ambitions have gradually shifted toward deep cooperation with private enterprises. In particular, SpaceX’s critical role in federal government contracts has become a core issue in current global aerospace policy and strategic planning.

According to various media reports, the U.S. government currently demonstrates a high level of reliance on Elon Musk’s SpaceX for space transportation and interstellar exploration missions. Information compiled by the Associated Press and inews indicates that NASA has signed multiple federal government contracts with SpaceX, which cover not only logistics resupply for low Earth orbit but also extend to future crewed lunar landings and deep-space exploration missions.

It is a widely acknowledged fact that SpaceX has become an indispensable commercial partner for the United States to maintain its space superiority. The launch capabilities and vehicle technologies it provides directly influence the scheduling and execution efficiency of NASA’s interstellar exploration efforts.

Although commercial cooperation has become an established reality, there is a clear divergence in media assessments of this model. Some reports suggest that U.S. interstellar ambitions are at risk of being "at the mercy of Elon Musk’s personal will." Citing a Wall Street Journal review of SpaceX’s federal contracts, some observers worry that the decision-making patterns of private enterprises may conflict with national long-term space strategic goals. Conversely, another perspective emphasizes that the rise of commercial spaceflight is an inevitable choice for reducing the costs of space exploration and accelerating technological iteration.

What remains to be confirmed is whether the U.S. government has sufficient contingency mechanisms in place to ensure that interstellar exploration missions will not be interrupted should SpaceX undergo significant operational adjustments or policy shifts in the future.

This trend has had a profound impact on the global space industry and policy. First, it has altered the traditional "government-led, contractor-executed" aerospace supply chain model, granting a single private enterprise unprecedented influence over national security and scientific exploration. For international partners, this means that future participation in NASA-led interstellar programs will require adapting to this highly commercialized operational environment. Furthermore, this places pressure on national space budget allocations; governments must strike a balance between maintaining autonomous space capabilities and purchasing commercial services to avoid over-reliance on a single supplier for critical technologies, which could otherwise weaken national strategic autonomy in space.

Regarding U.S. interstellar ambitions, academia and the industry have raised several limitations and warnings. First, overly binding national space policy to the commercial interests of a single entrepreneur may lead to uncertainty in policy implementation—this is not merely a technical issue, but a political risk. Second, current research in the scientific community regarding interstellar objects (such as the interstellar comet 3I/Atlas) still relies heavily on the open sharing of international data, rather than solely on the technical capabilities of a single corporation. Therefore, over-interpreting the dominant position of commercial spaceflight in interstellar exploration may overlook the core value of basic scientific research and multinational scientific cooperation in driving human exploration of the universe.

All parties should view the efficiency gains brought by commercialization with caution, while remaining vigilant about the potential strategic vulnerabilities it may introduce.

Looking ahead, future observation will focus on how NASA manages contract risks with SpaceX and whether the U.S. government will adopt a more diversified supplier strategy to mitigate risk. Additionally, as the decommissioning of the ISS approaches, international planning for the next generation of space stations and the role of private enterprises in deep-space exploration will become key indicators of whether this commercial model possesses long-term stability. The scientific community will also continue to monitor celestial bodies such as interstellar comets; these studies will not only reveal information about environments outside the solar system but will also continue to test the limits of human deep-space exploration technology and multinational collaborative capabilities.