“太阳黑子的古代观测”的概念、定义、翻译、参考文献-科学参考

单词	太阳黑子的古代观测
释义	太阳黑子的古代观测 Encyclopedia 理学太阳物理学释 ancient.sunspot observation太阳黑子的古代观测在望远镜发明以前直接用肉眼观察日面上的黑子现象。在一般情况下，由于太阳光十分刺眼，看到这种现象的机会不多。但在日出或日落时，或在大雾笼罩或风沙弥漫的天气，日光减弱，就有可能看到日面上的大黑子。
随便看	center of a sphere center of attaction center of buoyancy center of circumcircle center of curvature center of dispersion center of economic interest Center of Environmental Emergency and Accident Investigation, Ministry of Ecology and Environment of the People's Republic of China center of expansion center of figure center of force center of gravity Center of gravity method for facility location center of gyration center of homology center of inertia center of inflection center of interest center of inversion center of involution Center of land center of light center of magnitude center of mass center of mass angle

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