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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