Why do the asteroids in the asteroid belt not acrete?
Why don't the asteroids in the asteroid belt coalesce to form a planet?
How would the earth have evolved if the asteroid didn't hit the earth and kill the dinosaurs? What is the difference between an asteroid and a comet? What are the compound materials that make them? Can we bombard the whole asteroid belt into Mars and increase its mass to equal Earth and make it livable? What is the difference between asteroids and comets? Why don't planets have phases like the moon? What is the difference between a comet and an asteroid? What asteroid is getting moved? What is difference between asteroid and comet? Could an asteroid hit knock Earth off its orbit? Can objects in the Kuiper belt or the Oort cloud form into whole rocky planets? Why or why not? Could an asteroid impact knock the Moon into the Earth? Why don't we have a base on the moon? What is the largest asteroid in our solar system? Why comet is not a star? How many asteroids are in the solar system? Why do planets orbit stars? Why don't space organizations try to send spacecraft to planets like Neptune or Pluto? Why don't planets hit each other? (Even there's gravity) If a massive asteroid hit earth, would it be more catastrophic if it hit land or open ocean? Why is Pluto no longer considered a planet? How can we stop asteroids? Would we be better off if an asteroid hit land or water? Why isn't Pluto a planet? Why do planets float in space? What if, 65 million years ago, the asteroid didn't hit Earth and the dinosaur extinction didn't happen? Why can't planets be different shapes? Why don't we solve Earth's problems before trying to colonize Mars? If we detected a planet-killing asteroid, is there anything we could do about it at the present time? Why don't we load the earths trash on earth and launch it into space or toward the sun? Why don't gas planets have gas moons?