名词
中文翻译：Unknown
同义词：
['astronomical', 'astronomical observatory']
例句：
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1. The astronomers are conducting a new study on the solar system.
天文学家们正在对太阳系进行一项新的研究。
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2. The astronauts will be performing a routine check of the spacecraft before launch.
宇航员将在发射前对飞船进行例行检查。
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3. The astronomers have discovered a new planet in the constellation of Orion.
天文学家们在猎户座发现了一个新的行星。