Tuesday, May 19, 2020

What Is Supernova? Discovery, Observations And Types Of Supernova

Supernova is one of the most dangerous incidents in the universe in which a very old star occurs in its last moments and destroy with the explosion. When an incident of explosion occurs in a star, it produces energy, this energy or glow is called a supernova.

This explosion is very powerful. After this explosion, either a new star begins to form or after the old star explodes, it turns into a white dwarf. When a supernova explosion occurs, too much light is transmitted, which is so bright that it can leave the light behind the entire universe.

Many times the energy released by the explosion of a star is more than the energy emanating from the life of Sun, the most powerful planet in the solar system.

Observations About Supernova

SN 185 (RCW86)

Before telescopes were discovered, many civilizations have reported supernova explosions. The first supernova named  SN 185 (RCW86) was discovered by Chinese astronomers in the year AD 185. According to their records, it was a guest star that appeared in the night sky for eight months. Before the seventeenth century, only eight supernovas were discovered, while telescopes had been invented by that time.

Crab Nebula

The most famous of the supernovas discovered so far is the Crab Nebula. Chinese and Korean astronomers studied this process of star explosion in the year 1054. There is also a record of research done by scientists in North America. The supernova that caused the Crab nebula was so bright that scientists could see it even during the day.

S Andromadae (SN 1885A)

In the year 1930, under the leadership of Walter Bed, he was doing research on a supernova named S Andromadae (SN 1885A) which sits in another galaxy. He explained that the supernova process occurs when an ordinary star is about to transform into a neutron star. These people first used the term supernova for this explosion.

IPTF 14 HLS

Most supernovae die only after an explosion, that is, their brightness fades in a few months or weeks. But scientists have detected a star in which even after five explosions, it remains bright. For the past two years, the explosion incident in it remains intact. This time is six times longer than normal supernova time.

The explosion of stars is considered a reason for the lightning of stars to fade. Peter Nugent, a senior scientist at the US-based Lawrence Berkeley National Laboratory, said that he found that this supernova does not look like he has ever seen before. This fact has been revealed after detecting about 5,000 supernovas in the last two decades.

The name of this supernova is IPTF 14 HLS. It was detected in September 2014. At that time it looked like a simple supernova. Several months later, astronomers at the US-based Las Cumber's Observatory( LCO) found that the supernova was shining again.

Fellow Lire Arkawi in the LCO said that this supernova broke all records. This is the biggest puzzle that I faced during my studies of the explosion of stars in the last decade.

G351.7-1.2

A team of Indian astronomers has obtained evidence of a supernova explosion in a space field called G351.7-1.2. This supernova explosion is derived as a high-velocity stream of hydrogen. This is very important from the point of view of astronomy because this type of explosion has been attracting astronomers for many centuries.

Types Of Supernova Explosion

It is believed that every 50 years in our Milky Way a star undergoes a supernova explosion. It also said that somewhere in the universe, a star is destroyed every second.

How a star will be destroyed depends on its weight. The weight of the sun is not yet enough that this process can be done inside it. The supernova explosion occurs in two ways:

Supernova Type I

Before any nuclear explosion starts, the star starts storing the substances inside her. Here there is a lack of hydrogen in the illuminated part. This type of supernova is made up of white dwarf stars. With this type of help, scientists estimate the distance between stars because the brightness of these stars is very high.

Supernova Type II

In this supernova, when the nuclear fuel of the star runs out, it collapses under the pressure of its gravity. For this type of explosion to occur, the weight of a star should be 8 to 10 times higher than the Sun. It starts when hydrogen and helium gas is running out in the core part of a star.

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