Headlines about asteroids "worth trillions" make mining sound like a gold rush that is just about to start. The reality is quieter. No company has yet brought back a commercial cargo from an asteroid. What exists is a growing body of science missions that show what asteroids are made of and how hard they are to reach. This article separates the real findings from the hype.
Asteroids are leftovers from the formation of the planets about 4.6 billion years ago. Many have never been melted or reshaped by a large planet's gravity, so they keep their original ingredients. Those ingredients fall into a few useful groups:
Most experts see the first realistic market as space itself: fuel and materials used far from Earth, because launching mass from our planet is the expensive part. Bringing metal back to Earth is a much harder business case.
The best target is not the biggest or the richest one, but the one that is cheapest to get to in terms of velocity change (delta-v). Many near-Earth objects need a delta-v comparable to reaching the Moon's surface, and some need less. That is why missions such as Hayabusa2 and OSIRIS-REx chose small near-Earth asteroids.
Composition matters just as much. Astronomers classify asteroids by the light they reflect:
If you are unsure how these bodies differ from comets and meteors, see our guide to asteroid, comet, meteor and meteorite.
Real data come from science missions, not mining ones. Japan's Hayabusa2 returned roughly 5.4 grams of material from the carbon-rich asteroid Ryugu in December 2020. Analyses found organic molecules, including amino acids, along with water-bearing minerals. NASA's OSIRIS-REx delivered about 121.6 grams from Bennu in September 2023, and early analyses reported carbon compounds, clays and salts. Our article on OSIRIS-REx and Bennu covers that sample in detail.
These results confirm that carbon-rich asteroids hold water and organics. They also show the scale problem: the best-studied returned samples weigh a few grams to a few hundred grams. Mining would require millions of times more.
NASA's Psyche spacecraft launched in October 2023 toward the main-belt asteroid (16) Psyche, which is about 220 kilometers across. It is expected to arrive in 2029 and orbit the asteroid to map its surface, gravity and magnetic properties. Psyche is thought to be unusually metal-rich, with estimates in the range of tens of percent metal, but nobody knows yet whether it is a bare core remnant or a mixed rock-and-metal body.
You may have seen the claim that Psyche's metal is worth "$10 quintillion." That figure is only a back-of-the-envelope multiplication of mass by today's prices. It ignores the fact that flooding the market would collapse those prices, and that no one can currently reach, mine and return such a body. Psyche is a science mission to learn how planetary cores form, not a mining prospect.
Several start-ups launched in the 2010s with asteroid mining plans, and the best-known early ones were later wound down or sold. In 2025, the company AstroForge launched its Odin probe toward a small, possibly metallic asteroid, but contact was lost soon after launch and the company declared it lost. These stories show how difficult even the first steps are.
On the legal side, the 1967 Outer Space Treaty says no nation can claim sovereignty over celestial bodies. Whether that permits private ownership of extracted resources is debated. The United States passed a law in 2015, and Luxembourg and some other countries followed with their own, granting companies rights to resources they extract. Other countries and legal scholars disagree about how far this approach goes, and there is no global agreement.
There is also a planetary-defense angle. Any technology that lets us land on, anchor to and push on an asteroid is relevant to deflection missions, and detailed knowledge of an asteroid's structure helps us judge how it would respond. Tracking tools such as those described in how NASA tracks asteroids also double as prospecting aids, because they reveal which objects pass near Earth.
Is the asteroid Apophis a mining target? No. It is a stony asteroid about 340 meters across, studied for science and planetary defense. Read more in our Apophis guide.
Could asteroid metal make Earth rich? Unlikely in the near term. Transport costs are huge, and a large supply of any metal would lower its price.
Facts in this article are drawn from public scientific sources. For primary information, see: