天の赤道
Meanings
1
celestial equator
Astronomical term: the projection of Earth's equator onto the celestial sphere.
The celestial equator is a great circle on the celestial sphere that extends Earth's equator.
celestial equator
Astronomical term: the projection of Earth's equator onto the celestial sphere.
The celestial equator is a great circle on the celestial sphere that extends Earth's equator.