The number of stars now visible to the astronomers makes one's brain reel. 天文學家現在能看到的星星的數目，多得簡直令人頭暈目眩。
One of the seven celestial bodies, Mercury, Venus, the moon, the sun, Mars, Jupiter, and Saturn, visible to the naked eye and thought by ancient astronomers to revolve in the heavens about a fixed Earth and among fixed stars. 古行星能夠用肉眼看到七個天體之一，水星、金星、月球、太陽、火星、木星和土星，古代天文學家認為它在天空中圍繞著固定的地球和固定的恆星中旋轉
This star is not visible to the naked eye. 這顆星肉眼看不見。
