Where is astronomer Harley from?

Edmond Halley, a British astronomer, was born in England in 1656 and graduated from Queen's College, Oxford University at the age of 20. After that, he gave up the chance to get a degree and went to St. Helena to set up a temporary observatory. There, Harley carefully observed the astronomical phenomena and compiled the first South Catalogue, which made up for the lack of only the North Catalogue in astronomy.

Harley's southern star map contains the direction of 38 1 star. Published in 1678, when he was only 22 years old. He applied Newton's law to the motion of comets, and correctly predicted the fact that the comet now called Halley made a regression motion.

Harley's most famous contribution is his accurate prediction of comets. 1680, Harley cooperated with Cassini, the first director of the Paris Observatory, and observed a big comet that appeared that year. From then on, he became interested in comets.

Harley found that the number of orbital elements of a comet appeared in 1682, which was similar to that observed in Kepler 1607 and Apyan 153 1 year, with an interval of 75 or 76 years.

Harley repeatedly calculated with Newton's law of universal gravitation, and came to the conclusion that the comets that appeared three times were not three different comets, but the same comet appeared three times. Based on this, Harley predicted that the comet would reappear in 1759. 1759 In March, observatories all over the world were waiting for this comet predicted by Harley.

On March 13, this bright comet appeared in the starry sky with its long tail. Unfortunately, Harley passed away on 1742, so he couldn't see it with his own eyes. This comet was named Halley's Comet in 1758, about 16 years after his death. Harley's calculations predict that this comet will return at 1835 and 19 10. As a result, the comet arrived as scheduled.

Harley's achievements

Harley's most famous contribution is his accurate prediction of comets. Harley found that the number of orbital elements of a comet appeared in 1682, which was similar to that observed in Kepler 1607 and Apyan 153 1 year, with an interval of 75 or 76 years.

Harley's calculations predict that this comet will return at 1835 and 19 10. As a result, the comet arrived as scheduled. This comet is the "Halley's Comet" that almost everyone knows today. The mystery of the comet has been solved.

In addition, Harley discovered the star's self, which is another important discovery. Harley also proposed to use the opportunity of transit of venus to measure the distance between the sun and the earth, which provided a good method for accurately measuring the distance between the sun and the earth at that time. He also discovered the long-term acceleration of the moon's motion, which made an important contribution to the accurate study of the motion of the earth and the moon system.