A new Harvard study says that very few asteroids in our solar system are worth mining. But Dr. Martin Elvis, an astrophysicist, has calculated that only 10 asteroids (or 1 percent) would be suitable and come close enough to Earth for mining. He estimates the value of mined ore from those asteroids could be from $800 million to $8.8 billion. Which is a lot, but building a space mining company from the ground up is pretty expensive.
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