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Sunday, September 27, 2020
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Probing Into Supernova – The Final Destination of Stars

Supernova is the deafening explosion that takes place when a star dies emitting tons of materials, like iron, cloud and dust, at 15,000 to 40,000 kilometres per second in space. A star accumulates nuclear fuel at its centre which resists the outward gravity and keeps it heated. Millions of years later which this fuel diminishes, the star starts to cool off and no longer fights with the gravity. Eventually, gravity takes the upper hand, triggering the birth of supernova.

When a star dies, it sends shockwaves catapulting its outer parts to burst. It is hard to observe who exactly are the neighbours of a supernova thanks to the blinding light  it supplies, outshining everyone.

Even a single supernova can radiate more light and energy than Sun and burn for ages. To Earthlings, witnessing a supernova in the night sky is no less than a lightshow—a gala, brightest event in the sky. To scientists, explosions are important to measure their distance from Earth by calculating the amount of light they radiate into space.

Crab Nebula— Queen Bee of Supernovae

Crab Nebula

By far, the most famous supernova in the history of stellar explosions is Crab Nebula which took place in 1054 AD. Astronomers could see the burning explosion in the day sky and the rock paintings of Arizona and New Mexico predict that south-western Native Americans might well have gazed at it!

 

Supernova is not the only end of stars. . .

Sirius, or the Dog Star is a white dwarf star

It is not mandatory for every star to burst into a dramatically tipsy supernova explosion, a few die out slowly and become white dwarfs, red giants or black dwarfs. Black hole are sometimes the final product of a supernova, such as the AT2018cow in the constellation Hercules.

 

 

List of Well-Known Supernovae

 

SN 1987A- Observed as early as 1987, it was brightest of the lot whose power exceeded Sun by 100,000. The brightest pinpoint in sky was best observed by people living in the Southern Hemisphere

Kepler’s Supernova- The giant star detonation took place in the 17th century and was first observed with naked eyes by German astronomer Johannes Kepler in 1604
SN 1006- Located in Lupus constellation, SN 1006 is 7,200 light years away has 16 times more brightness than planet Venus
NS 185- The first recorded Supernova in 185 AD located around 21 million light years away from Earth and is visible to eyes with the simplest of binoculars in the market. For 10,000 years and more NS 185 is burning

SN2011by- A type la supernova which means a white dwarf star has exploded due to a fusion of carbon and oxygen

 

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