noun
heliocentric theory; heliocentrism
Scientific term for the astronomical model placing the sun at the center of the solar system. Often contrasted with 天動説 (geocentric theory).
See also: 天動説
コペルニクスは地動説を提唱した。
Copernicus proposed the heliocentric theory.
地動説は天動
The heliocentric theory replaced the geocentric theory.