The Aurora-class battleship is a warship utilized by the Ancients at the time of their war with the Wraith, first seen in "Aurora". In that episode, the Aurora is a crippled battleship whose crew have preserved themselves in stasis pods, which self-destructs to avoid falling into the hands of the Wraith. The Atlantis Expedition gains control of an Aurora-class battleship discovered by the Taranians in "Inferno"; it is named Orion by John Sheppard (who dislikes its original name Hippaforalkus). The Orion is barely operational when it is called upon to intercept two Wraith hive ships heading for Earth. Dr. Zelenka brings the weapons online at the cost of the shields, and the Orion manages to destroy one hive ship before being destroyed itself. The battleship Tria is encountered along with its Ancient crew in "The Return". The Travelers take control of a derelict battleship with Sheppard's help in "Travelers". In season 4, it is revealed that the Asurans have built 38 Aurora-class battleships for their war with the Wraith. The Daedalus and the Apollo destroy a few of them, and the rest are destroyed in the explosion of Asuras. One more battleship is known to exist, commanded by a duplicate Elizabeth Weir.
Aurora-class battleships are much larger than an Earth Daedalus-class battlecruiser and are substantially superior to Wraith hive ships. They are armed with drone weapons and are protected by energy shields. Large turrets line the ship, which are seen in action in "Be All My Sins Remember'd". They have intergalactic hyperdrives though they are not designed for such long trips, and their sublight engines can accelerate the ship to 99.9% of the speed of light. They can be powered by a Zero Point Module. The ship can project holograms remotely for communication purposes. They contain numerous stasis pods, which can be connected to allow the crew to interact in a virtual reality. The ship has hangar bays that can accommodate puddle jumpers or Wraith darts.