No, it is not true. They do hit planets sometimes.
Meteorites can from asteroids that landed on Earth's surface. They were originally chipped off larger planetary bodies by bolide impact.
Meteorites, bolides, some shooting stars, astroblemes, asteroids, etc.
These rocky bodies are called "Asteroids".
asteroids
of all the minor bodies of the solar system, the largest fragments of rock are called asteroids, so yeah. Of course, we have the "dwarf planets" now. They would be the answer, if you call them minor bodies
Meteorites, bolides, some shooting stars, astroblemes, asteroids, etc.
Meteorites can from asteroids that landed on Earth's surface. They were originally chipped off larger planetary bodies by bolide impact.
Asteroids are metallic, rocky bodies without atmospheres that orbit the Sun but are too small to be classified as planets. http://nssdc.gsfc.nasa.gov/planetary/text/asteroids.txt
Asteroids are the rocky bodies that have been compared to flying mountains. Asteroids are actually considered to be minor planets.
It is called a "planetary system" or "solar system" (the latter term is used alone or capitalized to mean the Sun's system of planets, moons, asteroids, meteoroids, and comets).
Stars.
Asteroids
Because spacetime is not actually a fabric, nor is it a solid or liquid or gas that friction can be created with.
The planets grew from the impact of innumerable smaller bodies early in the history of the solar system. This process is called planetary accretion. The early history of the terrestrial planets is marked by continuous collisions with larger and larger planetary bodies. Accretion was essentially complete by 4.56 billion years ago. Meteorites and asteroids are materials left over from the formation of the solar system that have not yet accreted to a planet. Accretion continues even today at a very slow rate whenever a meteor falls to Earth.
These rocky bodies are called "Asteroids".
asteroids
of all the minor bodies of the solar system, the largest fragments of rock are called asteroids, so yeah. Of course, we have the "dwarf planets" now. They would be the answer, if you call them minor bodies