Comets

A comet orbits the sun. Comets can sometimes be seen from earth as bright objects in the sky but they do not enter the earth's atmosphere. A shooting star is another expression for a meteor, a piece of something falling from space into the earth's atmosphere and creating a visible trail.

Comets always have two tails (ion tail and dust tail) and are so seen that way. the one tail (ion tail) is always pointing away from the sun showing which direction the comet is in comparison to the sun. the sun gives off a charge and hits the comet and that moves the ion tail showing which way the sun is. the (dust tail) shows the direction the comet is traveling.

However, the dust tail is generally brighter and more noticeable than the ion tail.

As of 2021, spacecraft have studied five comets up close: Halley's Comet (by the European Space Agency's Giotto spacecraft), Comet Borrelly (by NASA's Deep Space 1), Comet Wild 2 (by NASA's Stardust spacecraft), Comet Tempel 1 (by NASA's Deep Impact spacecraft), and Comet 67P/Churyumov-Gerasimenko (by the European Space Agency's Rosetta spacecraft).

Like all visible matter, comets are 'just' part of the universe and do not directly 'connet' to it. Their most direct 'connection' is to their star. All comets orbit a star. But more specifically the ones we know about are a part of our solar system - that is, their orbits are controlled by their relationship with our Sun.

Some of them never go past our solar system's 'outer limits' - what is known as the heliopause - others do, and travel in what is generally considered as interstellar space, but they are still gravitationally tied to the Sun.

The greatest distance that Pluto goes from the Sun is less than 50 astronomical units (1 AU = the distance of the Earth from the Sun). Comet Hale-Bopp is believed to go as far as 370.8 AU - a truly staggering 55,000,000,000 kilometres from the Sun. It takes it 2533 years to complete 1 orbit, over 10 times the time it takes Pluto to complete an orbit.

It is still unclear and waiting confirmation whether Burckle Crater was created by a comet or a meteorite. If this impact was caused by a comet then the latest known impact happened around 3000-2800 BC. This would mean also that comet impacts are far more common than previously was thought.

(See related link below for more information on the Burckle Crater.)

The coma of a comet is formed due to melting of the comet's nucleus by the Sun's energy. This creates a cloud of gas and dust that surrounds the nucleus and forms the visible atmosphere of the comet.

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.