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天象仪是用于进行人造星空表演的科普仪器。它能在半球形天幕上放映人们在地球上不同经纬度处看到的多种天象,如:日、月、星辰的东升西落,行星在恒星天空中穿行,地球自转轴的岁差运动等。它能使人们在几分钟内观察到数百年甚至上千年内发现的多种天象。
Planetarium is a popular science instrument for performing artificial stars. It can display on the hemispherical canopy many astronomical phenomena seen at different latitudes and longitudes on Earth, such as the rising and falling of the east, the moon and the stars, the passage of stars in the stellar sky, the precession movement of the Earth’s rotation axis, and the like. It enables people to observe many astronomical phenomena found in hundreds or even thousands of years in a matter of minutes.