The Asgard science vessel is a class of spacecraft used by the Asgard from the 21st century onwards. The only known ship of the class is the Daniel Jackson which was lost in April 2005 when Kvasir responded to an emergency call of Lord Yu that his domain was under attack from the Replicators. which turned out to be an ambush so that the replicators could get their hands on the replicator disruptor from the Asgard.