Orb: On the Movements of the Earth

Orb: On the Movements of the Earth
First tankōbon volume cover, featuring Rafal
チ。―地球の運動について―
(Chi: Chikyū no Undō ni Tsuite)
Genre
Manga
Written byUoto
Published byShogakukan
English publisher
MagazineWeekly Big Comic Spirits
DemographicSeinen
Original runSeptember 14, 2020April 18, 2022
Volumes8
Anime television series
Directed byKenichi Shimizu
Written byShingo Irie
Music byKensuke Ushio
StudioMadhouse
Licensed byNetflix
Original networkNHK General TV
Original run October 5, 2024 March 15, 2025
Episodes25

Orb: On the Movements of the Earth (Japanese: チ。―地球の運動について―, Hepburn: Chi: Chikyū no Undō ni Tsuite) is a Japanese manga series written and illustrated by Uoto. It was serialized in Shogakukan's seinen manga magazine Weekly Big Comic Spirits from September 2020 to April 2022, with its chapters collected in eight tankōbon volumes. Set in 15th-century Europe, the series follows the dangerous journeys of scholars who risk their lives to pursue research on the forbidden heliocentric theory.

A 25-episode anime television series adaptation produced by Madhouse aired from October 2024 to March 2025.

By February 2025, the manga had over 5 million copies in circulation.