Highlights

  • A UNSW Mining academic warns that off-Earth resources could favour wealthy, space-faring nations.
  • Engineering, cost and environmental hurdles mean space mining remains a distant prospect.
  • Global space law predates resource extraction plans, leaving ownership and benefit-sharing questions open.

Australia's resources sector has long been shaped by questions of who benefits from mineral wealth, and that debate is now stretching beyond the planet. Commentary from a University of New South Wales (UNSW) mining engineering professor has drawn attention across ASX-listed Metal and Mining Stocks to the idea of a "space gap", in which only high-income nations and well-capitalised organisations could reach and extract resources on the Moon, Mars or asteroids. The discussion links technical feasibility with governance and equity, themes that already sit at the centre of mining policy on Earth.

UNSW Research Flags a Potential Space Gap

Professor Serkan Saydam, chair of mining engineering at the UNSW School of Minerals and Energy Resources Engineering and deputy director of the university's Australian Centre for Space Engineering Research, has argued that the benefits of space mining should be weighed well before any resources are extracted beyond Earth.

His concern centres on access. Space-faring nations are predominantly wealthy economies, and only they, along with large private organisations, may have the capability to reach off-Earth deposits. Saydam has described the risk of monopolisation and a widening divide for lower-income nations, which today host a large share of terrestrial mining activity and draw meaningful economic benefit from it. Australia and Canada are notable exceptions as high-income mining nations.

What Lies Beyond Earth

The Moon and Mars are viewed as potential sites for future settlements and are understood to contain materials such as silicon, titanium and rare earth elements. A rare helium isotope, deposited in lunar soil by the solar wind, is often discussed as a potential fuel for future fusion energy, although that technology itself remains under development.

For mining engineers, the attraction of in-situ resource use is largely practical. Transporting material from Earth into space is extremely costly, so sourcing water, construction materials and fuel locally could underpin longer missions. That rationale differs from the idea of shipping minerals back to Earth for commercial markets, which faces far steeper economic barriers.

Engineering and Cost Barriers Remain Significant

Saydam has been candid that engineers do not yet know exactly how to mine off-Earth. Concepts exist, but key questions remain about suitable equipment and methods. Conditions are extreme: the Moon has no atmosphere to shield against meteoroids, radiation exposure is a constant concern, and dust on both the Moon and Mars is very fine and abrasive, threatening machinery and seals.

Lower gravity may alter how equipment behaves and cannot be fully replicated on Earth for testing. Communication delays with Mars point towards semi-autonomous systems supported by human decision-making. Distance and cost are viewed as the most formidable obstacles, and Saydam has indicated that the financial capacity for such ventures, particularly on Mars, does not currently exist.

He has also stressed that cultural, environmental and emissions impacts must be considered. A sharp rise in rocket launches, for example, could add to emissions on Earth, and he has said off-Earth mining must be sustainable as well as ethical.

Space Law Was Not Written for Mining

The governing framework is the Outer Space Treaty, a United Nations agreement from the Cold War era. It states that outer space, including the Moon and other celestial bodies, is not subject to national appropriation, and that exploration and use should be carried out for the benefit and in the interests of all countries.

The treaty was drafted at a time when concerns about weapons in orbit dominated, long before resource extraction was a realistic prospect. As a result, rules on ownership of extracted material, royalties and benefit-sharing remain unsettled. Saydam has noted that these governance gaps sit alongside the engineering challenges as matters that need answers.

Relevance for Australia's Resources Sector

Australian universities, including UNSW, have built research capability in off-Earth mining, drawing on the country's deep expertise in automation, remote operations and mining engineering. Those skills are already applied at remote terrestrial sites, and research into extreme environments can feed back into technology used on Earth.

For now, space mining is not a commercial concern for the resources industry. No ASX-listed company has been identified in connection with the commentary, and the discussion is best viewed as a long-horizon policy and research topic rather than a near-term market development.

Final Word: Equity Questions Before Extraction

The space gap debate reframes off-Earth mining as a question of fairness as much as technology. Significant hurdles around cost, equipment, environment and law remain, and experts argue these should be addressed before any extraction begins. For Australia's mining community, the conversation highlights how governance, sustainability and benefit-sharing, already central on Earth, are likely to shape how the frontier is approached.