What evidence is there for asteroid impacts on planets?
Craters and the position of the planet.
The solar system can be divided in two parts, by the asteroid belt. The planets that are closer to the sun than the asteroid belt are Mercury, Venus, Earth, and Mars. These are the inner planets. The planets more distant from the sun than the asteroid belt are Jupiter, Saturn, Uranus, and Neptune. Those are the outer planets. And even farther out are the dwarf planets and comets.
Nothing officially separates them but most asteroids are between Mars and Jupiter. There is no planet separating the Outer planets. Outer planets are Jupiter, Saturn, Uranus and Neptune and this are gas giant. Asteroid belt consists of asteroid and Ceres, the Dwarf planet so an Dwarf planet and Asteroid belt separates the Planets.