Ra's planet
Astrographical information
Galaxy	Milky Way
Societal information
Race	Uninhabited
Technological period	None, (present) Advanced (past)
Under control of	None, (present) Apophis, Ra (past)
Out of universe information
Appearances	"Threshold"

[Source]

Ra's planet was a planet in Milky Way Galaxy which held a Stargate. The planet was once under Ra's domain but it was attacked by Apophis. The planet was bombarded from orbit and the entire surface was devastated; many Jaffa died during the attack. (SG1: "Threshold")