Lantea is located in the galaxy of Pegasus. At some point at least 10,000 years ago it became home to Atlantis, a flying city inhabited by the Ancients, which could travel between galaxies and moved from the Milky Way to Pegasus. The planet is mostly ocean however there is one large inhabitable land mass that we become aware of early in Season 1, and which is home to the Athosians in the present day however we do not know whether or not it was inhabited 10,000 years ago. Besides the Ancients and Athosians the only known inhabitants of Lantea thus far have been the human race from Earth between 2004 and 2007.
Lantea itself had no known defensive technology before the arrival of the Ancients however with there arrival it gained at least one defensive satellite on the edge of the star system and of course Atlantis' own compliment of drone weapons. When the Atlantis expedition arrived from Earth in 2004 this was soon complimented by the addition of a number of rail guns also positioned on Atlantis.
 Key Events
These would include the Ancients landing Atlantis on Lantea in the distant past, the siege of Atlantis around 10,000 years ago by the Wraith, the arrival of the Atlantis expedition from Earth and the colonisation of the mainland by the Athosians in 2004, the second siege of Atlantis in 2005 and the departure of the expedition on-board Atlantis in 2007.
 Key Episodes
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