A company called Planetary Resources wants to mine asteroids that are close to Earth for water and precious metals. While Planetary Resources is looking at near-Earth asteroids, NASA has its eye on a bigger prize. The space agency is planning on sending a probe in 2023 to a massive asteroid circling Jupiter that is made almost entirely of iron and nickel. The calculated worth of the asteroid is 10 quintillion dollars! That’s a one followed by 19 zeros and doesn’t include the gold, copper, and platinum to be found there as well.