卫星环绕地球转。
——阿诺德·斯班塞·琼斯爵士，英国皇家天文学家，1957(2周后斯巴尼克人造卫星环绕地球)。
Sir Harold Spencer Jones, Astronomer Royal of the UK, 1957 (two weeks later Sputnik orbited the Earth).
很多天文爱好者最初对该领域的研究都是从业余爱好开始的，他们会用双筒望远镜观察星系的变化，观察人造卫星环绕地球运行的规律。
Astronomy enthusiasts often enter this field as hobbyists, using binoculars or a telescope to observe the motion of planets or artificial satellites orbiting the earth.
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