Cat: Astronomy-Phrase

經由觀察北極星的仰角變化 By observing changes in the North Star's angle of elevation

經由觀察北極星的仰角 By observing the North Star's angle of elevation

以天球北極為中心 Centered on the celestial sphere's North Pole

在黃道上的運動方向 Direction of movement along the ecliptic

分別為春分點及秋分點 Respectively these are the points of the Vernal and Autumnal equinoxes

太陽在黃道上的運動方向 The sun's direction of movement along the ecliptic