Black Holes - An Exotic Yet Menacing Mystery

 


The entire concept of Black Holes is puzzling yet quite intriguing mystery. Their entire entity contradicts many and most scientific laws. As if, physical laws cease to exist inside them at all. This mystery has puzzled many scientists however, they are still studying them in order to know more about them. Many discoveries have been made since their initial recognition. 

 

Historical Background

 Their initial characterization was evaluated by Karl Schwarzschild in 1916 whereas, their initial interpretation of 'regional spaces from where nothing can escape' was first presented by David Finkelstein in 1958. Their evaluation was evaluated through Einstein's 'General Theory of Relativity', the theory greatly helped scientists understand their existence and properties. Studies were, and still are, conducted so that they could be understood. All the studies led to the following definition of Black Holes :

Black Holes are regions of spacetime where the gravitational force is so strong that nothing can escape from it's surrounding, not even light rays or even electromagnetic waves/rays. Nothing can escape it's grasp. 

Present Understanding

Originally, according to the theory of relativity 'a sufficient compact mass can deform spacetime to form a Black  Hole'.

All the study that had been done till recent was based on assumptions and estimations. The scientists could view far away Black Holes but couldn't present it in a photographic format. This was the case until 10th April, 2019. That day the world was presented with something unprecedented, that was the first-ever photograph of a Super Massive Black Hole (SMBH). The photo was a huge scientific achievement that was done with the help of hundreds of scientists around the world. This was a massive project and required a lot of time, effort and money. The picture revealed is as follows:
 
 
The photo's focus was not very sharp due to the sheer distance of the black hole from the Earth. A simulated photo of a black hole is given as follows:
 
 
Black Holes comprise of different sections regarding their entire physical body. Some include :

The Accretion Disk

An accretion disk is a structure formed by diffuse material in orbital motion around a massive central body. The central body is typically a star. Friction causes orbiting material in the disk to spiral inward towards the central body. (Source : Wikipedia)

The Singularity 

The Black Holes, in their center, consist of a puzzling dark void called the Singularity.

The Event Horizon

The 'event horizon' the boundary definition of a Black Hole, it defines the region from where not even light can escape from; i.e, the escape velocity exceeds the speed of light.




Overall, there's a lot to Black Holes and they still are, to a major extent, a mystery that has yet to be completely unfolded.

I hope you got to learn something new from this blog and for further research and study you can visit the site COSMOS (https://astronomy.swin.edu.au/cosmos/). If there are questions or any type of suggestions you would like to ask or recommend, then you can do so by commenting down in the comments. That is all from me today.


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