We now know that an asteroid is a big rock flying in space,
a meteoroid is a small chunk broken off of an asteroid
and a meteor is a chunk of that meteoroid that burns up in the sky when falling to a planet.
So what's a meteorite then?
If a meteor enters a planet's sky and doesn't burn up all the way,
sometimes it actually hits the planet.
When it actually hits the planet, it's called a meteorite!
Most meteorites are really small like a baseball and don't cause any damage, others are bigger than a car!
![meteorite](https://upload.wikimedia.org/wikipedia/commons/thumb/2/26/Meteorite_Tindouf_NWA_869.jpg/237px-Meteorite_Tindouf_NWA_869.jpg)
(from: wikipedia - meteorite)
![big meteorite](https://upload.wikimedia.org/wikipedia/commons/thumb/c/cc/Willamette_Meteorite_AMNH.jpg/360px-Willamette_Meteorite_AMNH.jpg)