- 他們使用了哈勃空間望遠鏡發現了天體的大小。
They used the Hubble Space Telescope to discover the size of the object.
- 天文學是一門有關天體的科學。
The science of astronomy relates to heavenly bodies.
- 黃緯黃道以南或以北天體的用角度量的距離
The angular distance of a celestial body north or south of the ecliptic
- X選BL Lac天體的某些性質
Some Properties of X-ray Selected BL Lac Objects
- 黃緯黃道以南或以北天體的用角度量的距離
The angular distance of a celestial body north or south of the ecliptic.
- BL Lac天體的譜性質
The Spectral Properties of BL Lac Objects
- BL Lac天體的含義（Ⅰ）
Implications of BL Lac Objects(Ⅰ)
- 天頂一個天體的明顯運動達到最高點
The highest point reached in the apparent motion of a celestial body