So... is Chi. Chikyuu no Undou ni Tsuite finished or not?
YES, it is finished.
Why?
The anime finished after the manga:
Anime finished: March 15, 2025
Manga finished: April 18, 2022
MangaUpdates contains information about the anime adaptation and indicates that it is complete.
Watching Order (by release date)
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Synopsis
Chi. Chikyuu no Undou ni Tsuite follows young Rafal, a brilliant but emotionally reserved boy in 15th century Poland. He initially plans to study theology to gain societal approval.
However, a chance encounter awakens a hidden passion within him: astronomy. Specifically, Rafal becomes fascinated with heliocentrism, the idea that the Earth revolves around the Sun.
This belief clashes with the dominant geocentric view of the Church, which holds immense power and punishes dissenters harshly. Rafal's quest becomes a dangerous one.
He must find ways to prove heliocentrism scientifically while carefully concealing his heretical beliefs to avoid persecution and protect himself from the Church's wrath.