Transcription: What purpose could a double star serve? If there were two suns moving around a common center of gravity, any planet would follow complicated and unstable orbits, and the fluctuations in climate would make life there impossible. Therefore, true double stars could not exist. William Herschel was of the same opinion when he began his impressive survey of the sky, searching for double stars. However, his The main aim was to measure the distances of stars. The basic method of measuring distances has been known since ancient times. It is known as the method of parallax. A nearby star will show a sli ... File Comment Made in Intimate Arts
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