Near-Earth asteroids are increasingly viewed as accessible sources of raw material because reaching some of them costs less delta-v than reaching the Moon's surface. Metallic (M-type) asteroids are believed to be fragments of the cores of shattered protoplanets, making them unusually rich in nickel-iron and platinum-group metals compared to Earth's crust. Carbonaceous (C-type) asteroids instead hold water ice and organic compounds, valuable as in-space propellant and life-support feedstock rather than structural metal. In microgravity, a mining rig cannot rely on drilling with downward force the way terrestrial equipment does, so concepts favor anchoring, robotic arms, or contact-free methods like laser or ion-beam ablation to vaporize and capture surface material. This scene depicts a simplified version of that idea: a drone orbits a rotating, irregularly-shaped rocky body and periodically fires a cutting beam that chips off debris.

• Typical asteroid rotation period: roughly 2-20 hours for most bodies (some "spinners" rotate in minutes, others tumble over days).
• M-type (metallic) asteroids: iron, nickel, and platinum-group metals; some estimated to hold trillions of dollars in raw material.
• C-type (carbonaceous) asteroids: water ice and organics, useful as rocket propellant feedstock (split into H2/O2) and radiation shielding.
• Escape velocity of a small asteroid is often only a few cm/s to a few m/s, so anchoring/tethering is required to avoid drifting off.
• Proposed mining techniques: laser/ion ablation, robotic arm sampling, magnetic rakes, and full-body bagging ("capture bag") concepts.
• Near-Earth asteroids (NEAs) number in the tens of thousands of cataloged objects, with new ones discovered continually.
• Economic motivation: reducing launch mass by sourcing water/fuel and rare metals in-space instead of lifting them from Earth's gravity well.