Comets

Comets range in temperature from about minus 200 degrees Celsius (minus 328 degrees Fahrenheit) in the outer solar system to a few hundred degrees Celsius (up to around 500 degrees Fahrenheit) when passing close to the Sun.

It can be seen every 75-76 years. The next predicted perihelion of Halley's Comet will be 28 July 2061.

Yes, Hale-Bopp is classified as a long-period comet because it takes more than 200 years to complete one orbit around the Sun. Its orbital period is estimated to be around 2,500 years.

Halley's Comet's last appearance was in 1986, and its average period of revolution around the Sun is 76 years. But it turns out that the gravitational pull of the giant planets creates variations in that period of up to a few years (so the time between successive appearances isn't always exactly 76 years). Its next appearance should be in 2061.

It's still traveling in outer space...where else could it be? And hopefully the 3 Saturn Shaped UFO's that came with it, that I observed while on Earth have finished their mission. TRUE THAT!!

Comets can be classified into two main types: short-period comets, which have orbits of less than 200 years and originate from the Kuiper Belt; and long-period comets, which have orbits of more than 200 years and originate from the Oort Cloud. Additionally, there are also sungrazing comets, which pass extremely close to the Sun.

Halley's Comet appears as a bright, glowing object with a visible tail of gas and dust. It has a distinct blue-green color due to the gases surrounding it. The comet's appearance can vary depending on its distance from the Sun and Earth.

Out of the three, planets are far larger than asteroids or comets. The technical definition of a planet is a cosmic mass that's large enough to be rounded by its own gravity, but not so large that gravity causes extreme pressures to heat the object and turn it into a nuclear furnace (a sun).

Asteroids and comets, on the other hand, are basically chunks of matter (rock and possibly ice and gases) that remain, compared to planets, irregularly shaped.

More info: https://en.wikipedia.org/wiki/Planet

Comets typically have elliptical orbits, which means their paths around the Sun are elongated and not perfectly circular. This is due to the gravitational influence of other celestial bodies, causing their orbits to be more elongated.

it s a comet which can be seen every 76 years ,it was last seen in the year 1986,march 8

The latest visit by Halley's Comet to the inner solar system was in 1986. Its next perihelion to the Sun will be July 28, 2061.

People have observed Halley's comet through telescopes, spacecraft missions, and by tracking its trajectory through the sky. Amateur astronomers also observe the comet during its periodic appearances every 75-76 years, providing valuable information about its behavior and characteristics.

The hazy patch surrounding the nucleus of a comet is called the coma. It is composed of dust, gas, and water vapor that have been released from the nucleus as it is heated by the Sun. The coma can extend for thousands of kilometers around the nucleus.

Comets are named for their discoverers. Astronomers who are comet-watchers (a large percentage of comets are discovered by amateur astronomers) live and work in the hopes of finding a comet and writing their names in the heavens.

For example, the comet that struck the planet Jupiter was named for the two discoverers, Shoemaker and Levy.

Comets' tails typically point away from the sun due to the solar wind pushing the gas and dust particles released from the comet's nucleus. The ion tail is affected by the solar wind's electrically charged particles, while the dust tail is affected by radiation pressure from sunlight.

Near the sun: A cometary nucleus has a "corona" (a vapor outgassing of it's nucleus, up to a million times wider than the comet itself - this is what we see as the "head" of the comet), and one or several "tails". The "tail" we usually see is the vapor trail, but sometimes a secondary gas trail is also visible. Far from the sun, it is just the nucleus. Typically 3 to 10 kilometers wide, oddly shaped, like a potato or a peanut and, somewhat surprisingly , very dark in color, like soot.

Yes, all comets develop tails when they approach the Sun. The tail forms as the Sun's heat vaporizes the comet's icy nucleus, releasing gas and dust that get pushed away from the comet by solar wind and radiation pressure, creating the characteristic tail.

In 1986, the Giotto spacecraft flew within 400 miles of the nucleus of Halley's Comet. This close encounter provided valuable data and images of the comet's nucleus and helped scientists learn more about these cosmic objects.

The first "certain" appearance of Halley's Comet is from 240 BC, in the Chinese chronicle Records of the Grand Historian or Shiji, which describes a comet that appeared "in the east and moved north".

Comets are classified based on the length of their orbital period and their origin. Short-period comets have orbital periods less than 200 years, while long-period comets have longer orbital periods. Comets can also be classified based on their composition and physical characteristics, such as size and brightness.

Comets have been compared to "dirty snowballs"; rocks and dust held together by various types of ice. In deep space, everything cools down because the Sun is so far away, and several elements that we think of as "gasses" are frozen solid in comets.

As the comet approaches the Sun, the Sun's heat begins to melt some of the surface layers into gas, and the sunlight hitting the gas is reflected back to Earth as the "tail" of the comet. Some comets have been known to explode, as the heat of the sun melts a large ice pocket into vapor and breaks off pieces of the comet's core.

Maria Mitchell, an American astronomer, discovered a new comet in 1847. This was the first comet discovered by an American and she received global recognition for her achievement.

Some scientists think that a gigantic asteroid may have hit the Earth where the Gulf of Mexico now is, leading to the extintion of the dinosaurs and many other forms of life because of the global cooling created by the dirt and dust thrown into the atmosphere. Other scientists do not agree with this hypothesis and believe the Gulf of Mexico was formed by the drifting apart of the Caribbean and North American tectonic plates.