日地关系是电离层和气候等方面影响的总称。太阳是一颗基本稳定的恒星,辐射总量变化甚微。但它的外层大气受太阳磁场支配而处于局部激烈活动中,使太阳辐射在紫外线和X 射线波段有大幅度起落。太阳活动明显的标志是黑子,其次为光斑、耀斑、日珥及日冕膨胀等,而最强烈和对地球影响最大的是耀斑。参见“ 耀 斑”。
所有的图像都是日地关系观测飞船拍摄发回来的。
Both images were taken by the Solar Terrestrial Relations Observations (STEREO) Ahead spacecraft.
从日地关系的角度出发，探讨太阳活动对人类疾病有何影响。
On the basis of the solar-terrestrial relations point of view, the paper investigates the influences of solar activities upon the human race.
从日地关系的角度出发，探讨太阳活动对人类流行性疾病的影响。
On the basis of the solar-terrestrial relations, investigations of the influences of solar activities upon the human beings epidemic diseases are made in this paper.
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