- Psyche, asteroid orbiter, NASA, USA (5 replies)
- Asteroid mining from Planetary Resources, Inc., Redmond, Washington, USA (3 replies)
- Asteroid mining from Bradford Space, Inc., McLean, Virginia, USA (1 replies)
- "Asteroid Mining 101: Wealth for the New Space Economy", book, John S. Lewis, 2015 (0 replies)
- Miscellaneous (3 replies)
- Definitions (0 replies)