The so-called "food" is a celestial body that was another celestial body or its Heiying Yanzhe all or part of the astronomical scene.
所谓"食"就是指一个天体被另一个天体或其黑影全部或部分掩遮的天文景象。
Astronomers % are involved in the observation, analysis and research of various astronomical phenomena, such as the movements of celestial bodies like moons, planets, stars and galaxies.
天文学家的工作涉及到观察、分析以及研究各种各样的天文现象，比如月亮、行星、恒星、银河等天体的运动。
Ancient mariners, whether they be Vikings or South Sea Islanders, would navigate with astronomical bearings by reading the celestial bodies as well as landmarks.
古代的航海家，不管是维京人还是南太平洋岛民，都会携带天文仪出海，以观天象和地标。
Astronomers are involved in the observation, analysis and research of various astronomical phenomena, such as the movements of celestial bodies like moons, planets, stars and galaxies.
天文学家的工作涉及到观察、分析以及研究各种各样的天文现象，比如月亮、行星、恒星、银河等天体的运动。
Astronomers o are involved in the observation, analysis and research of various astronomical phenomena, such as the movements of celestial bodies like moons, planets, stars and galaxies.
天文学家的工作涉及到观察、分析以及研究各种各样的天文现象，比如月亮、行星、恒星、银河等天体的运动。
Know astronomical unit and light year are used for expressing the distance between celestial bodies.
知道天文单位和光年是用来丈量天体之间距离的单位。
Since he was fascinated by celestial stars in his childhood, he has been working for astronomy, contributing many astronomical illustrations to books, magazines, and planetariums.
自从他在他的童年被天空星迷住， 他一直为天文学工作，把很多天文的插图献出到书，杂志和天文馆。
In117bc zhang heng of the east han dynasty manufactured the water-driven celestial globe a large astronomical time-measuring apparatus that had the primitive function of a mechanical time measurer.
公元前117年，东汉的张衡制造了大型天文计时仪器——水运浑天仪，初步具备了机械性计时器的作用。
In117bc zhang heng of the east han dynasty manufactured the water-driven celestial globe a large astronomical time-measuring apparatus that had the primitive function of a mechanical time measurer.
公元前117年，东汉的张衡制造了大型天文计时仪器——水运浑天仪，初步具备了机械性计时器的作用。
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