Facies orbitalis

例句：

1. 1.The study of celestial bodies is a fascinating field of science.
   研究天体是科学中一个令人着迷的领域。
2. 2. The constellation Orion is known for its bright star, Rigel.
   猎户座以其明亮的恒星，里格尔而闻名。
3. 3.Astronomy is the study of the universe, including stars, planets, and galaxies.
   天文学是研究宇宙，包括星星、行星和星系的学科。