An entrepreneur has a dream. He wants to create the most amazing and magical amusement park in the solar system. He goes to investors with the blue prints of the park, and they think it's a good idea, but they are only willing to fund enough money to buy an asteroid in the asteroid belt, as the overpopulation in the solar system has made all other available land extremely expensive.
The entrepreneur is so elated that the investors accepted his pitch, that he immediately buys all of the materials to build the park. But in his excitement, he forgot one major detail. Due to the extremely low gravity on even the largest asteroids, most of his rides are nearly useless.
He panics. He already spent almost all of his investors' money. If he doesn't fix this problem he will go into massive debt. So, as a work around, the entrepreneur decides to use the remaining money to install enough mass at the center of his asteroid to simulate the gravity of the Earth.
What would be the consequences of an asteroid in the asteroid belt (say about 20-30 mile radius) gaining enough mass to simulate the gravity of the Earth?
- What consequences would this have on the asteroid belt itself?
- What consequences would this have on the rest of the solar system?
- And finally, is there any material dense enough to do this without increasing the size of the asteroid or would a black hole be necessary?