comet core

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Comets are mostly formed from an area called Oort cloud that lies at the extreme end of the solar system, well ahead of the Kuiper Belt. The top of the comet consists of large rocks around it, a dense gas mantle called a coma. The rest of the comet is made up of dust particles and gases of gas burner that often glow in the night and present some terrifying scenes.

These comets are attracted by the Sun's gravity leading to the Sun's orbit, but the electromagnetic current emanating from the Sun - the solar wind pushes the gaseous portion of the condensed portion of its coma backward. Due to this, their millions of kilometers long tail are formed. This comet is mostly visible to the people of the earth, orbiting the sun from the same fixed path and almost at the same time.

Some comets change their path by the stretch of gravity of Jupiter. And sometimes it collides with this planet and gets destroyed.

They often name their names after the astronomer who searched for them. Like Hale Dhoom Ketu after the name of William Hale. Shumaker Levi Dhoom Ketu. But now their names are numerical according to the year and month of their discovery.

Why the comet's orbiting path is hyperbolic with hyperbolic is not entirely clear, although some theories have been made

You see how the Indian name Dhoom + Ketu - is giving an accurate knowledge of its structure: that a long tail made of smoke or gas. Ketu means a tail shaped like a long flag.

Did astronomers in India have knowledge of comets? 

Certainly was. In the sixth century, Varahamihira has written the names of many Ketu in Ketucharadhyay of the book Brihat Samhita and has also mentioned the names of many Ketuas in the name of his predecessor Garg Adi Acharyas. This means that at the time of writing the comet observation book, at least one and a half thousand years before the 6th century, ie 1000 B.C.E., there must have been an observation of the comets. Comet is mentioned.
When the comets pass through the belt of dust emitted by such comets on the earth's travel path, these dust particles collide with the ionosphere, the upper layer of the earth's atmosphere, and burn by rubbing and being burned in the atmosphere before coming down - Just as a few hundred pieces of two to four inches of travel shield spacecraft, which were destroyed by the India anti-satellite missile, are going to be destroyed by the rubbing of the atmosphere.

When some big pebble stones of comets fall on the earth, they are called meteorites. These comet remnants located on the Earth's travel path are known as the constellations near which they are seen. As Prithvi lion passes through the zodiac sign in August, the meteors seen near the lion are called Li Onis. Some meteors are also seen from the asteroid belts located between the orbit of the Guru and Mars, due to the attraction of the Guru to the objects moving towards the Earth's orbit into the Earth's atmosphere.

Now the children of today do not sleep on the roofs in summer, otherwise, they would have seen a white or yellow streak deteriorating in the sky every minute like our childhood. Then we used to think that someone went to heaven from earth or coming from heaven to earth. But now it is known that this is just the glow of dust particles left in the comet.

How much we learn from science.