How many years does Halley s Comet orbit the Earth?

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In ancient times, people thought that the appearance of comets was a bad omen, until the 17th century, when the English astronomer Halley began to calculate the orbits of comets, he found that the comets of 1682, 1607 and 1531 had similar orbits, he judged that the three comets were actually the same comet, and predicted that it would reappear at the end of 1758 or early 1759. In 1759, the comet appeared. Although Halley had died in 1742, the comet was called "Halley's Comet" in his honor.

Halley's comet has a return period of 76 years, with the most recent return in 1986. Above, Halley's Comet passes through the Milky Way.

76Give me a red flag, thank you.

1, Halley's Comet.

The period around the Sun is about 76 1 years.

2. Halley's Comet has an orbital period of 76-79 years, and the next time it passes perihelion.

It will be July 28, 2061. Halley's Comet is the first recorded periodic comet.

By 240 BC, or 466 BC at the latest.

3. Halley's Comet is the only short-period comet that can be seen directly from Earth with the naked eye, and it is also the only comet that can be seen twice with the naked eye in a person's lifetime. Other comets that can be seen with the naked eye may be more spectacular and beautiful, but those are comets that only appear once in thousands of years.

4. At that time, the 26-year-old British astronomer Halley was particularly interested in the comet. He carefully observed and recorded the comet's position and its diurnal changes in the starry sky. After a period of observation, he was surprised to find that the comet did not seem to be a newcomer to Earth for the first time, but an old friend who seemed to be familiar.

Halley's Comet was the first recorded periodic comet, in 240 BC or 466 BC at the latest, in China and Cuba.

There are clear records of the comet's appearance in Babylon, as well as in medieval Europe, but it was not known at the time that it was the same comet.

Appear. According to Zhu Wenxin's research: from the seventh year of Qin Shihuang (240 BC) to the second year of Xuantong of the Qing Dynasty (1910), there were 29 records.

and conform to the calculation results.

Comet Hazaola is the only short-period comet that can be seen directly from Earth with the naked eye, and the only one in a person's lifetime where it is possible to see both with the naked eye.

times of the comet. Other comets that can be seen with the naked eye may be more spectacular and beautiful, but they only appear once in thousands of years.

Halley's Comet became the first comet to be observed in detail by a spacecraft, providing a first-hand look at the nucleus structure with the formation of the comet and the tail.

Information on the mechanism. These observations support some long-standing assumptions about comet structure, notably Fred Hewlett-Packard's "Dirty Snow."

The "sphere" model correctly speculates that Halley's Comet is a mixture of volatile ice such as water, carbon dioxide, and ammonia and dust.

The information provided by this mission also significantly reforms and reconfigures the idea of these materials; For example, understand the surface of Halley's Comet mainly.

It is dusty, has no volatile substances, and is only a small part of ice. The Orionid meteor shower is made up of the famous Halley's Comet.

caused.

Halley's Comet has an orbital period of 76-79 years.

Halley's Comet is a cyclical comet that orbits the Sun once a year and is visible to the naked eye. It is named after the English physicist Edmund Halley (1656-1742) who first measured his orbital data and successfully predicted the time of return.

Halley's Comet was the first recorded periodic comet, and at the latest in 240 BC or 466 BC, there were clear records of the comet's appearance in China, ancient Babylon, and medieval Europe, but it was not known at the time that it was a recurrence of the same comet. According to Zhu Wenxin's research, from the seventh year of Qin Shi Huang (240 BC) to the second year of Xuantong of the Qing Dynasty (1910), there were 29 records, and they were in line with the calculation results.

76-79 years.

Halley's Comet has an average orbital period of 75 or 76 years, but you can't use 1986 plus a couple of 76 years to get its exact return date. The gravitational pull of the main planet causes it to change its cycles, falling into one cycle after another. Non-gravitational effects (evaporation when close to the Sun) also play an important role in making it change periodically.

Between 239 BC and 1986 AD, the orbital cycle varied from year) to year (451 and 1066). The closest perihelion was 11 BC and 66 AD.