Standing on the surface of Mars, looking back at the distant Earth—a dream brought to life by SpaceX’s Starship. Yet, despite the promise, numerous challenges remain. A study published in Nature, one of the most reputable scientific journals, casts doubt on SpaceX’s ambitious timeline to send humans to Mars by the end of the decade.

The study highlights significant technological and logistical gaps that must be addressed to make the mission viable. “Overall, with the limited information published by SpaceX about its system and mission scenario and extrapolation from us to fill information gaps, we were not able to find a feasible Mars mission scenario using Starship, even when assuming optimal conditions,” explains Nature.

Reality Check

But dreams often face the harsh light of reality. The study points out major technological challenges, such as the orbital refueling system, which involves transferring fuel in space—a system that is still under development.

Another critical technology is the heat shield, designed to protect the spacecraft during entry into Mars’ atmosphere. Despite confidence in its design, extensive testing is still required to ensure its reliability. These unproven technologies could significantly delay the mission timeline.

Mars Survival Kit

At the heart of making Mars home is the need to live off the land. This is where the In-Situ Resource Utilization (ISRU) system comes into play. ISRU aims to produce fuel and oxygen from Martian resources. However, the current ISRU technology is far from ready, with high power requirements and limited functionality.

Similarly, the Fission Surface Power System (FSPS), a nuclear power system needed to support operations on Mars, is still in development. While small nuclear reactors have been successfully tested on Earth, the larger systems required for Mars are not expected to be ready until at least 2031.

Feasibility Questions

As the dream of Mars beckons, so do questions about its feasibility. The study recommends international collaboration to share the burden of technology development and improve feasibility. Innovations like the MegaFlex solar arrays, designed to provide power, show potential but are still at a medium readiness level. It also suggests increased funding and a reassessment of the mission timeline, with mid-2030s being a more realistic target.

Additionally, the study advises prioritizing robotic exploration before sending humans to Mars. That is probably a sound advice as, according to Nature, “the current estimate does also not allow the return flight of Starship.”