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利用小孔成像原理和万有引力定律求太阳的平均密度杨雪剑 (山西孟县一中 045100) 在天文学上,太阳的半径、体积、质量、密度都是常用的物理量.下面介绍一种利用小孔成像原理和万有引力定律相结合,简捷测定太阳平均密度的方法 1 测定太阳密度的原理假设地球上某处对太阳的张角为θ,地球绕太阳公转的周期为T,太阳的半径为R,密度为ρ,质量为M。由三角关系可知,该处距太阳中心的距离r
Using the principle of small hole imaging and the law of universal gravitation to calculate the average density of the sun Yang Xuejian (Mengxian Yizhongzhong 045100, Shanxi) In astronomy, the radius, volume, mass, and density of the sun are commonly used physical quantities. The following describes an imaging principle using small holes. Combined with the law of universal gravitation, a simple method for determining the average density of the sun 1 The principle of determining the density of the sun Assuming that the angle of the sun at some point on the earth is θ, the period of the earth’s revolution around the sun is T, the radius of the sun is R, and the density is ρ The quality is M. From the triangular relationship, the distance r from the center of the sun is known.