Researchers at EPFL have explored possible supply chains between asteroids and Mars, including extracting metals from metallic asteroids and producing fuel from carbonaceous asteroids. According to the model, the idea is only possible if the right targets are chosen and local resources in space are exploited.
Could the rocks floating in space one day help humanity survive on another world? Scientists are starting to investigate whether asteroids could provide the metals and fuel needed to support life on Mars.
In the Bruce Willis movie Armageddon, there are oil drillers in space and an asteroid the size of Texas hurtling toward Earth. Amidst the Hollywood chaos lies a genuinely interesting question: What exactly could we do with an asteroid if we got our hands on it? It turns out the answer has nothing to do with blowing it up (sorry, Bruce) but a lot to do with building a new world.
Building a colony on Mars is not just an engineering problem, but also a logistical one. The murky logistics will ultimately determine whether humanity becomes a multiplanetary species or remains rooted to Earth.
The logistical challenge of a Mars colony
Think about what a colony on Mars needs. Not just food and oxygen, but metals. Structural steel for living quarters, aluminum for equipment, iron for tools, and many of the components will wear out, break down, and need replacing. Bringing all of this from Earth every time is not a serious long-term strategy.
Launching a rocket costs tens of millions per ton of payload, and the journey to Mars takes between six and nine months, depending on where the two planets are in their orbits. You can't run a hardware store with that kind of supply chain.
A new study has explored mining metals from asteroids and bringing them directly to Mars. There are millions of asteroids in the solar system, and the metallic ones, called M-type asteroids, are essentially giant chunks of iron, nickel, and other valuable materials floating in space. The question is whether we can actually reach them, extract what we need, and bring them to Mars efficiently enough to make it worthwhile.
It turns out that the answer is a cautious yes, but with conditions.
Asteroid supply chains and innovative fuels
The team ran a computer program that tests thousands of different combinations to find the best possible answer from multiple supply chains. They took into account the energy required to fly between different asteroids and Mars, the mass of metals that could realistically be mined, and the fuel needed for the return flight.
In the last crucial matter, there is a clever twist in the plot. There are asteroids that are carbonaceous, rich in carbon and water ice. With the right processing of these materials, it is possible to produce rocket fuel there in space, and then there is no need to carry fuel from Earth for the return flight. In the study, this possibility is built directly into the supply chain calculations.
Realistic goals and the future of the space industry
The results identify specific asteroids that are within reach of current spacecraft technology, and the energy costs to get there and back are low enough to make the mission viable. The team quickly realized that it all depends on choosing the right targets. A poor asteroid choice will consume more fuel than the metals they will yield.
This research is important not because it solves the problem (we are still a long way from mining metals from asteroids) but because it shows that the problem is 100% solvable. A supply chain that brings metals from space to Mars, and uses fuel produced on the asteroids themselves. The colony on Mars will need builders, and also someone to sort the shipments, and this research shows that it is doable.
for the scientific article DOI:10.48550/arxiv.2604.18664
Short FAQ
Why should asteroids be mined for a colony on Mars?
A colony on Mars would need metals, spare parts, structures and fuel. Transporting all the equipment from Earth would be expensive and slow, so researchers are looking at using resources already in space.
What are M-type asteroids?
These are metallic asteroids, typically rich in iron, nickel, and other metals. They are being studied as a possible source of raw materials for construction and manufacturing on Mars.
How can asteroids provide fuel?
Carbonaceous asteroids may contain water and carbon-rich materials. With proper processing, they could be used to produce rocket fuel in space, reducing the need to launch fuel from Earth.
Is mining asteroids for Mars already possible today?
The study does not present an immediate implementation plan. It offers a logistical model that shows that certain scenarios may be possible in terms of energy, orbits, and selection of suitable asteroids.
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It's an illustration anyway. Besides, the movies about Mars were filmed in Wadi Rum in Jordan, and the ground in the Ramon Crater is also quite similar to Mars, to the point that they're doing simulation experiments for a mission to Mars there. Better than the Sahara.
Posting a picture of the Sahara Desert and claiming it's Mars is a joke. And this isn't the first time you've been caught doing it.