Space Time And The Universe - Seeker's Thoughts

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Thursday, 2 August 2018

Space Time And The Universe

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A hundred years ago Albert Einstein published his general of theory of relativity. A brilliant, elegant theory that has survived a century, provides the only successful way of describing space time.  There are plenty of theoretical indications though yet general relativity isn’t the end of the story of space time. And in fact , general relativity as an abstract theory may actually lead us on a century-long detour in understanding the true nature of space and time.

What is space time?
Newton initially told that our space is flat, there is no curve of any kind, they used simple 3D to reproduce any item like the Cartesian coordinates. It contains three axis x, y, and z. 

therefore  According to newton , we need only 3 dimension x y and z to define an object. And he told that space and time are different. According to him, the time constant and space and time are equal for all observers.

For example – if you spend and hour in the universe, then it will be equal to everyone and everyone will spend an hour. But does that happen?

What Einstein said?
if we take a little bit of science information, it does not happen,  According to Einstien, to measure an event we need time along with space and time is not equal for all observer. For this reason, he gave special theory of relativity.
Space does not exist without time and time does not exist without space. This means that we can not walk in space without time  i. e if we have to walk in space then we have to talk in time also. Similarly if we want to move in time then we have to move in space.

What are black holes?
A black hole (the phrase is usually credited to the American physicist john wheeler in 1967, and is certainly a distinct improvement on the original label of “gravitationally completely collapsed objects”) is a region of space in which the gravitational field is so powerful that nothing, including electromagnetic  radiation such as  visible light, can't escape its pull – a kind of bottomless pit in space-time.

As its centre lies an infinitely small infinitely dense singularity a space where the normal laws of physics break down.

What are wormholes?
Wormholes were theorized in 1916, a wormhole is a theoretical passage space time that create shortcuts for long journeys across the universe. Wormholes are predict by the theory of general relativity. But the wary: wormholes bring with them the dangers of sudden collapse, high radiation and dangerous contact with exotic matter.

Through the wormhole : science fiction is filled with takes of travelling through wormholes. but reality of such travel is more complicated, and not just because we’ve yet to spot one.