How is a comet s tail formed?

The bright tail extension of a comet can be an extension of the comet's head or have a structure that distinguishes it from the comet's head; Comet tails are mainly composed of gas and dust. Except when it is far from the Sun, the comet's long, bright, sparse tail gives the impression that the comet is very close to Earth, even within the range of our atmosphere. In 1577 Tycho pointed out that when viewed from different locations on Earth, comets did not show any different orientations

Thus he rightly came to the conclusion that they must be far away. Comets belong to small bodies in the solar system. Hope.

Sometimes, when we gaze at the sky at night, we see a beautiful astral body. It holds its slender "tail" and passes through the night sky, like a little fairy sailing in the sky, it is a comet, as the most beautiful star in the universe!

Comets are stars that enter the planets of the solar system and rotate around the sun in terms of color and appearance with the change of solar distance, and have a distinctive appearance in the shape of clouds and mist. Comets are composed of three parts: the nucleus, the coma, and the tail, and the key constituent material of the Hui nucleus is the ice matter!

In ancient times, comets were also turned into mourning stars, which have always been regarded as a bad omen and can cause disaster for everyone. This kind of concept has been going on for thousands of years, and understanding the development trend of modern scientific research, experts are unhappy about comets: comets belong to a kind of planets in the solar system, and some comets will regularly orbit around the sun's rays!

How can a comet have a long, slender "tail"? In fact, comets are much smaller than you can see, and some of their solid-state parts are about the size of planets! We know that the key to the comet's nucleus is made of icy material, and when the comet is close to the planet, because of the danger of the sun's temperature, the comet's material will be raised, creating a looming structure around the ice core, which is called Huifa.

At the same time, the tail of the comet will continue to be composed of a thinner material, because the comet is made up of all kinds of frozen debris and floating dust, and when it avoids the sun, it is only a small misty patch of color; And when it is close to the sun, due to the volatilization, vaporization, expansion, and eruption of the condensate, it causes a comet tail. The volume of the comet tail is huge, and it can reach hundreds of millions of kilometers. It has a variety of shapes, some of which are more than one, and generally widens in the direction of the sun's rays, and the closer it is to the tail of the comet, the longer it becomes.

The comet has a long "tail" and can reach tens of millions of kilometers, and it can reach hundreds of millions of kilometers at most! It's much bigger than the Wisdom Core itself. And this frequent "tail" announcing the mark of the comet is also the reason why the comet is called the mourning star!

Moreover, comets are not limited to one "tail", some comets have two "tails", such as the Midea - Comet Rauschenberg. In fact, it is not only gases but also aluminosilicates and other stable substances that are blown out by the solar wind, but the relative density of this substance is much higher than that of gases, so it is not blown out of various shapes by the solar wind.

The sun is reflected by this substance with a yellowish or bright red surface, and this substance also produces another kind of comet tail, and the comet tail produced by this floating dust is very easy to disintegrate into several, but biologists do not have this kind of comet tail disintegrating!

Although the comet is beautiful, it does not have a long lifespan, and every time the comet passes through the vicinity of the sun, its ice material will be affected by the high temperature of the sun and volatilize the hit-and-run, and the comet will gradually disintegrate. If the comet had been made of gas, it would probably have been evaporated by the sun's light!

The reason for the appearance of small tails is that the comet is relatively far from the sun, so it is affected by high temperatures, and such small tails appear. The tail is usually made up of ice cubes, which volatilize when it encounters the sun.

This is because the comet is heated and evaporates on its surface as it approaches the Sun, and the Sun has radiation and solar wind that blows the vaporized gases in the direction away from the Sun, so it looks like it is dragging a tail. The tail of a comet is mainly composed of dust and ice slag that erupts after being exposed to the sun and heated, and some of it is ionic tail formed by ionization.

Because comets are made up of icy material, the comet will be affected by the high temperature of the sun when it orbits the sun, and the ice material will be sublimated, so it will form a small tail of the comet, and the tail of the comet is composed of various impurities and dust.

The comet drags its small tail because it is formed in high-speed motion due to falling gravel and dust. I also don't know exactly what the composition of the tail is.

Comet tails are made up of gas and dust; The combined effect of 4 blows it out of the comet.

The interaction of these effects makes each comet tail look different. Of course, the material evaporates into the comet and tail, consuming the material of the comet's nucleus. Sometimes it comes in bursts, as is the case with Comet Billa; It broke into two when it passed through the sun in 1846, and disappeared after that passage in 1852.

A large cloud of gas and dust, the precursor of the solar system, may have been compressed by a supernova** shock wave 4.6 billion years ago, and began to slowly rotate and collapse into a disk, with the young Sun at the center of the disk.

The cloud particles on the disk collide with each other, and a considerable proportion of the material condenses into the planets and their moons, and some of the remaining cloud particles condense into comets.

A comet is a small, small, cloudy object that orbits the Sun in an oblate elongated orbit (very few in a near-circular orbit).

There are three types of orbits of comets: elliptical, parabolic, and hyperbola. Comets with elliptical orbits are also called periodic comets, and the other two orbits are called non-periodic comets. Periodic comets, in turn, are divided into short-period comets and long-period comets.

Generally, comets consist of a comet head and tail. The head of the comet consists of two parts, the nucleus and the coma, and some also have the comet cloud. Not all comets have structures such as a nucleus, a comet, a tail, etc.

In ancient China, the shape of comets has been very studied, and there are 29 comet maps painted on the silk book unearthed from the ancient tomb of the Western Han Dynasty in Mawangdui, Changsha. In the Jin book "Astronomical Chronicles", it is clearly stated that comets do not emit light, but are seen by us because they reflect the sun's light, and the direction of the comet's tail is facing away from the sun. Comets are huge, but their masses are pitifully small, and even large comets are less than 1/10,000th the mass of Earth.

Since the comet is composed of various impurities and dust that are frozen, when it is far from the sun, it is just a small speck in the shape of a cloud; And when it is close to the sun, due to the evaporation, vaporization, expansion, and eruption of the condensed solid, it produces a comet tail. The tail of the comet is extremely large, and can be hundreds of millions of kilometers long. It comes in a variety of shapes, some with more than one, and generally always extends in the direction of the opposite sun, and the closer it is to the sun, the longer the comet's tail becomes.

Comets are small, icy objects in the solar system that show visible coma (thin, vague, temporary atmosphere) and tail when it gets close enough to the Sun. This phenomenon is due to the combined action of solar radiation pressure and solar wind on the comet nucleus. i. The ion tail is due to the ionization of the comet's material by the sun's ultraviolet rays, and the ions are completely directed in the opposite direction of the sun under the action of the solar wind; ii. Dust tails are formed by relatively large particles under the action of sunlight pressure.

The dust tail and the ion tail point slightly in different directions.

The shape of comets is not uniform, and the comet that appeared in 1744 has six tails, and it stretches across the sky, 44 degrees, like a large fan; At the beginning of March 1976, a comet was seen in the eastern part of China, with a tail like a white peacock opening the screen, and it could be seen from Hainan Island to Heilongjiang. When it comes to the size of comets, no planet in the solar system can be compared with large comets, the famous Halley's Comet, which has a diameter of 570,000 kilometers. The largest comet ever recorded, with a diameter of 1.85 million kilometers, is 1.85 million kilometers long, and the largest is hundreds of millions of kilometers long from beginning to end.

Comets have orbital periods ranging from years to thousands of years. Short-period comets originate from the Kuiper Belt or its associated scattering disks beyond Neptune's orbit. Long-period comets are thought to have originated in the Oort Cloud, a hypothetical globular cloud of icy objects in the outer reaches of the solar system.

Long-period comets rush from the Oort cloud to the Sun because they are disturbed by the gravitational pull of massive objects (Jupiter, Saturn, Uranus, and Neptune) in the outer solar system or by other stars that pass around them.

The Oort cloud is a spherical shell containing a large number of comets at a distance of about 3,000-100,000 astronomical units from the Sun, roughly to the midpoint of the nearest star's distance. It may contain as many as nearly a trillion comets, their orbits are haphazard, not all of them are within the orbital planes of the planets, and the comets we see in the inner solar system are temporary visitors from the Oort cloud, which are detached from the clouds by the gravitational pull of nearby stars and fall towards the Sun along an orbit that would take millions of years to orbit for one revolution. Some of these visitors are trapped in short-period orbits and repeatedly enter the inner solar system – Halley's Comet is a well-known example.

For most of the time of its orbit, the comet does not have a comet tail, only when it reaches a distance of about 2 astronomical units (about 300 million kilometers) from the sun, under the action of the solar wind and the pressure from the sun, the gas and particulate dust thrown from the comet head extend outward to form the comet tail.

Comet tails come in a variety of shapes and can be summarized into three types, namely I-type, type, and type. Type I tail is mainly formed by a gas composed of charged particles, ions, and is relatively straight, thin, and slightly bluish.

Type and type comet tail are composed of dust, pale yellow, wider than type I, and more curved, the less curved is called the type comet tail, and the more curved degree is the type comet tail.

Because there are both gas and dust in the comet's tail, it is not uncommon for a comet to have both a gas comet tail and a dust comet tail when it is closer to the sun and more active.