Asteroid

An Asteroid is a small celestial body composed of rock and metal that can range greatly in size. In 2002, Anubis sent an asteroid composed almost entirely of naquadah to Earth that was large enough to destroy the planet.

In 2007 when Atlantis was under attack from an Asuran Stargate satellite, Col. Sheppard came up with a plan to use one of the the several asteroids in the Lantean system to temporarily intercept the weapon's beam in order to take the strain off of Atlantis' shield so the city could power up its star drive and leave the planet.

When Atlantis was adrift in space after fleeing Lantea, it encountered a large asteroid belt. In order to protect the city, a fleet of puddle Jumpes intercepted and destroyed the asteroids before they could reach and damage the city. Althoigh Dr. Zelenka was still hit in the leg with a micro asteroid while trying to fix some severed power conduits.