Asteroid / Comet
Meteoroids, Meteors & Meteorites
Three names for one falling rock.
A meteoroid is the rock in space; a meteor is the streak of light as it burns in our atmosphere; a meteorite is what reaches the ground.
See also
Asteroids
Rocky relics of the early Solar System.
Comets
Dirty snowballs from the outer Solar System.
Near-Earth Asteroid
An asteroid whose orbit ventures near Earth.
Trojan Asteroid
An asteroid sharing a planet's orbit at L4 or L5.
Centaur Object
An icy small body roaming the outer planets.
Trans-Neptunian Object (TNO)
Any minor body orbiting beyond Neptune.