紧急报警系统测试的日期与小行星从地球和月亮之间穿过之间有什么关系么？
Is there any relationship between the date of the EAS test and the passage of an asteroid passing between the Earth and Moon?
结果漂亮的描述了当月亮通过地球阴影时，月地距离和本影截面积的相对大小关系。
The result nicely illustrates the relative size of the umbra's cross section at the distance of the Moon, as well as the Moon's path through the Earth's shadow.
应用推荐