It's been a thousand years since the Gauna, a strange alien race with no known method of communication, destroyed the solar system. A portion of humanity managed to escape using enormous seed ships like the Sidonia, which have allowed them to maintain the population while drifting through space. Nagate Tanikaze is a young man who has been raised deep in the bowels of the ship. When he goes into training to pilot the huge robotic weapons known as Gardes, Nagate is entrusted with piloting the legendary unit known as Tsugumori. Nagate and his fellow pilots put their lives on the line against the Gauna, in the ultimate battle for the survival of humanity.
It debuted in Kodansha magazine Afternoon's June issue in 2009. Since then, 15 tankōbon have been released. The manga has been licensed in North America by Vertical, who released all volumes in English between February 5, 2013, and April 26, 2016. The manga ended on September 25, 2015.
An anime adaptation was produced by Polygon Pictures with a first season that premiered on April 10, 2014 and ran thru June 26, 2014. The series has also been localized and streamed by Netflix in all of its territories since July 4, 2014, becoming the service's first original anime. A second season (also known as Sidonia no Kishi: Daikyū Wakusei Senki or Knights of Sidonia: Battle for Planet Nine) aired from April 10, 2015 to June 26, 2015. Since Netflix usually waits until a season is complete before streaming, it was released on July 3, 2015 for streaming. Gekijō-ban "Sidonia no Kishi", a long compilation anime film (134 minutes) was released on March 6, 2015.
- Sidonia no Kishi Season 1 (シドニアの騎士 Knights of Sidonia)
- Gekijō-ban "Sidonia no Kishi" (劇場版「シドニアの騎士」Knights of Sidonia Movie) - compilation movie of season 1
- Sidonia no Kishi: Daikyū Wakusei Senki (シドニアの騎士 第九惑星戦役 Knights of Sidonia: Battle for Planet Nine)
- Sidonia no Kishi Season 3 (not yet released)