天文学是一项针射整个宇宙以及自然存在于宇宙内的天体，如月球、太阳、行星和恒星的科学研究。
Astronomy is the scientific study of the universe as a whole and of objects which exist naturally in space, such as the moon, the sun, planets and stars.
天文学是一项针射整个宇宙以及自然存在于宇宙内的天体，如月球、太阳、行星和恒星的科学研究。
Astronomy is the scientific study of the universe as a whole and of objects which exist naturally in space, such as the moon, the sun, planets and stars.
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