In Harley's time, no one realized that comets would return to the sun regularly. Since Harley had this bold idea, he devoted himself to the observation and research of comets with great interest. After a lot of observation, research and calculation, he boldly predicted that the comet that appeared in 1682 would return again at the end of 1758 or the beginning of 1759. Harley was nearly 50 years old when he made this prediction, and it will be another 50 years before his prediction is correct. Realizing that he couldn't see the return of the comet with his own eyes, he said in a humorous and regretful tone: If the comet really returns in 1758 as I predicted, fair descendants will probably not refuse to admit that it was first discovered by an Englishman.
Many years after Harley's death 10, at the end of 1758, the first comet predicted to return was observed by an amateur astronomer, and it returned to the sun on time. Harley's prediction at the beginning of18th century was finally confirmed after more than half a century. Later generations named this comet "Halley's Comet" in memory of him. In fact, every time I returned to China from 240 BC, it is recorded in history. The earliest time may be the year when Zhou Wuwang cut Zhou, that is, BC 1057. Halley's comet will return on time about every 76 years. When Halley's Comet returns, we can do a lot of observation and research on it. The latest regression of Halley's Comet is 1986. Like other countries, China has made a lot of observations and found the phenomenon of tail breakage. Its return will wait until around 2062.