| 地球白天何时离太阳最近 |
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| 引用本文： | 周教生,雷桂林,郑卓. 地球白天何时离太阳最近[J]. 甘肃联合大学学报(自然科学版), 2006, 20(3): 45-47 |
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| 作者姓名： | 周教生 雷桂林 郑卓 |
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| 作者单位： | 甘肃联合大学,理工学院,甘肃,兰州,730000 |
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| 摘 要： | 根据地球绕太阳公转和自转的数据,计算出临界点,进而定性地阐明了人们在早晨、中午和傍晚看太阳远近的规律.
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| 关 键 词： | 地球自转 地球公转 椭圆轨道 临界点 |
| 文章编号： | 1672-691X（2006）03-0045-03 |
| 收稿时间： | 2004-03-22 |
| 修稿时间： | 2004-03-22 |
When Is the Earth Closest to the Sun in the Daytime |
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| ZHOU Jiao-sheng,LEI Gui-lin,ZHENG Zhuo. When Is the Earth Closest to the Sun in the Daytime[J]. Journal of Gansu Lianhe University :Natural Sciences, 2006, 20(3): 45-47 |
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| Authors: | ZHOU Jiao-sheng LEI Gui-lin ZHENG Zhuo |
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| Abstract: | In this paper,according to the data of the speed and course of the earth's spin and revolution round the sun,we calculate the critical point,then on certain condition,we further expound the rule of the distance between the sun and the earth when we watch the sun in the morning,noon and evening. |
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| Keywords: | the earth spins the earth revolves round the sun oval track critical point |
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