Space-time-
Space-time, in actual science, single idea that perceives the association of reality, first proposed by the mathematician Hermann Minkowski in 1908 as an approach to reformulate Albert Einstein's exceptional hypothesis of relativity (1905).
Normal instinct recently assumed no association among reality. Actual space was held to be a level, three-dimensional continuum—i.e., a course of action of all conceivable point areas—to which Euclidean hypothesizes would apply. To a particularly spatial complex, Cartesian directions appeared to be most normally adjusted, and straight lines could be advantageously obliged.
Time was seen autonomous of space—as a different, one-dimensional continuum, totally homogeneous along its limitless degree. Any "presently" in time could be viewed as a beginning from which to take length past or future to some other time moment. Consistently moving spatial organize frameworks connected to uniform time continua addressed all unaccelerated movements, the extraordinary class of purported inertial reference outlines. The universe as per this show was called Newtonian. In a Newtonian universe, the laws of physical science would be something very similar in every inertial edge, so one couldn't single out one as addressing an outright condition of rest.
In the Minkowski universe, the time facilitates of one organised framework relies upon both the existence directions of another moderately moving framework as indicated by a standard that shapes the fundamental adjustment needed for Einstein's unique hypothesis of relativity; as per Einstein's hypothesis there is nothing of the sort as "concurrence" at two distinct marks of room, henceforth no supreme time as in the Newtonian universe.
The Minkowski universe, similar to its archetype, contains an unmistakable class of inertial reference outlines, however presently spatial measurements, mass, and speeds are altogether comparative with the inertial casing of the eyewitness, keeping explicit laws initially figured by H.A. Lorentz, and later framing the focal standards of Einstein's hypothesis and its Minkowski translation. Just the speed of light is something similar in every inertial casing. Each set of directions, or specific space-time occasion, in such a universe, is depicted as a "here-at this point" or a world point. In each inertial reference outline, all actual laws stay unaltered.
Einstein's overall hypothesis of relativity (1916) again utilizes a four-dimensional space-time, however, fuses gravitational impacts. Gravity is presently not considered as a power, as in the Newtonian framework, however, as a reason for a "distorting" of space-time, an impact portrayed expressly by a bunch of conditions detailed by Einstein.
The outcome is a "bent" space-time, rather than the "level" Minkowski space-time, where directions of particles are straight lines in an inertial arrange framework. In Einstein's bent space-time, an immediate expansion of Riemann's idea of bent space (1854), a molecule follows a world line, or geodesic, fairly similar to the manner in which a billiard ball on a distorted surface would follow a way controlled by the twisting or bending of the surface. One of the essential precepts of general relativity is that inside a holder following a geodesic of room time, like a lift in free-fall, or a satellite circling the Earth, the impact would be equivalent to a complete shortfall of gravity. The ways of light beams are likewise geodesics of room time, of an exceptional sort, called "invalid geodesics."
Einstein and Newton theories-
In both Newton's and Einstein's hypotheses, the course from gravitational masses to the ways of particles is fairly indirect. In the Newtonian plan, the majority decide the all-out gravitational power anytime, which by Newton's third law decides the speed increase of the molecule.
The genuine way, as in the circle of a planet, is found by tackling a differential condition. In everyday relativity, one should settle Einstein's conditions for an offered circumstance to decide the comparing design of room time, and afterwards tackle a second arrangement of conditions to discover the way of a molecule. Nonetheless, by conjuring the overall guideline of comparability between the impacts of gravity and of uniform speed increase, Einstein had the option to find certain impacts, like the avoidance of light when passing an enormous article, like a star.
The principal careful arrangement of Einstein's conditions, for a solitary circular mass, was done by a German space expert, Karl Schwarzschild (1916). For supposed little masses, the arrangement doesn't vary a lot from that managed by Newton's gravitational law, however enough to represent the beforehand unexplained size of the development of the perihelion of Mercury. For "huge" masses the Schwarzschild arrangement predicts uncommon properties. Galactic perceptions of small stars, in the long run, drove the American physicists J. Robert Oppenheimer and H. Snyder (1939) to hypothesize super-thick conditions of issue. These, and other speculative states of gravitational breakdown, were borne out in later disclosures of pulsars, neutron stars, and dark openings.
A resulting paper of Einstein (1917) applies the hypothesis of general relativity to cosmology, and truth be told addresses the introduction of present-day cosmology. In it, Einstein searches for models of the whole universe that fulfil his conditions under reasonable presumptions about the huge scope construction of the universe, like its "homogeneity," implying that space-time appears to be identical in any part as some other part (the "cosmological rule"). Under those suspicions, the arrangements appeared to infer that space-time was either growing or contracting, and to build a universe that did neither one of the einsteins, added an additional term to his conditions, the alleged "cosmological consistent." When observational proof later uncovered that the universe did truth be told appear to extend, Einstein pulled out that idea. In any case, closer examination of the extension of the universe during the last part of the 1990s again persuaded that a cosmological consistent ought to in reality be remembered for Einstein's conditions.
Some theories scientists still don't know-
In spite of its unpredictability, relativity stays the most ideal approach to represent the actual marvels we think about. However, researchers realize that their models are inadequate in light of the fact that relativity is as yet not completely accommodated with quantum mechanics, which clarifies the properties of subatomic particles with outrageous exactness yet doesn't join the power of gravity.
Quantum mechanics lays on the way that the smidgens making up the universe are discrete, or quantized. So photons, the particles that makeup light, resemble little lumps of light that come in unmistakable bundles.
A few scholars have hypothesized that maybe space-opportunity itself additionally comes in these quantized lumps, assisting with connecting relativity and quantum mechanics. Scientists at the European Space Office have proposed the Gamma-beam Cosmology Global Research centre for Quantum Investigation of Room Time (GrailQuest) mission, which would zoom all throughout our world and make super precise estimations of far off, amazing blasts called gamma-beam blasts that could uncover the very close nature of room time.
Such a mission wouldn't dispatch for no less than 10 years and a half be that as it may, on the off chance that it did, it would maybe assist with settling probably the greatest secrets staying in physical science.
Can we stop time?
Maybe yes we can stop the time if a person is travelling at the speed of light and the time will be stopped for him and the rest of the people would not get affected by it.
This means, that the faster you move the time will be spent slower for the travelling person and moving fast will make you observe that the object is small.
Conclusion and thoughts-
We have different arguments relating to space-time with a unique point of view but mostly we look for the theories of Einstein and Issac Newton. Space-time is like a single rubber fabric of space and time together acc. to Einstein. Newton says that time is absolute for everyone, like if a person spent his two hours standing on the street then the same two hours will be the same for everyone in the whole universe which are now gone everybody spent those two hours at the same speed like that of the man. But,
Einstein says that time is relative, means the time spent depends on the observer and it is different for everyone, to make this understand he gave a statement that "if you are sitting on a hot frypan for 2 minutes it seems to be 2 hours but if you are talking with a really nice girl for 2 hours it will look like 2 minutes".
Still, we follow the time notion postulated by Einstein but for everyone, their viewpoints can be correct.
And sometimes I thought like time really does not exist in any form it was just created or invented to distribute our day in pack of some time and that why we wear watches.
There is also a funny myth about the invention of time that is was the important topic for the clock companies to sell their more products, but this statement is just for fun and no any seriousness or proof about this, but these can be deep?