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An examination of the big bang theory

Big Bang Theory is about the origin of Universe. It suggests that about 1370 crore 13. At this instant, matter, energy, space and time were not existent. Then an examination of the big bang theory with a bang, the Universe began to expand at an incredible rate and matter, energy, space and time came into being. As the Universe expanded, matter began to coalesce into gas clouds and the stars and planets.

Some scientists believe that this expansion is finite and will done day cease. After this point in time, the Universe will begin to collapse until a Big Crunch occurs. Just before the Big Bang No one knows what the universe was like at this time. But no one knows how space and time came into existence in the first place. The first few minutes to next thousand years After the initial expansion, the universe an examination of the big bang theory sufficiently to allow the formation of subatomic particles, including photons, electrons, protons and neutrons.

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Though simple atomic nuclei formed within the first three minutes after the Big Bang, thousands of years passed before the first electrically neutral atoms formed.

The majority of atoms that were produced by the Big Bang are hydrogen, along with helium and traces of lithium. If the universe had remained this hot and dense for much longer, the hydrogen would all have been cooked into other chemical elements. Without hydrogen, there would be no water, and therefore no life as we know it! As the Universe continued to cool, it would have eventually reached the temperature where electrons combined with nuclei to form neutral atoms recombination.

But when the free electrons were absorbed to form neutral atoms, the Universe suddenly became transparent. Those same photons — the afterglow of the Big Bang known as Cosmic Background Radiation — can be observed today. Opacity of the early Universe before recombination is, in effect, a curtain drawn over those interesting very early events. Fortunately, there is a way to observe the Universe that does not involve photons at all. Gravitational wavesthe only known form of information that can reach us undistorted from the instant of the Big Bang, can carry information that we can get no other way.

Rate of Expansion of Universe is not decreasing, but increasing due to Dark Energy! It had always been assumed that the matter of the Universe would slow its rate of expansion. Mass creates gravity, gravity creates pull, the pulling must slow the expansion. But supernovae observations showed that the expansion of the Universe, rather than slowing, is accelerating. Something, not like matter and not like ordinary an examination of the big bang theory, is pushing the galaxies apart.

Whether dark energy is a type of dynamical fluid, heretofore unknown to physics, or whether it is a property of the vacuum of empty space, or whether it is some modification an examination of the big bang theory general relativity is not yet known. Answer in Inflationary model Our investigation shows that the early Universe an examination of the big bang theory too homogeneous.

Evidence for the Big Bang

How could pieces of the Universe that had never been in contact with each other have come to equilibrium at the very same temperature? Whatever its nature, the inflationary model predicts that this primordial energy would have been unevenly distributed in space due to a kind of quantum noise that arose when the Universe was extremely small. This pattern would have been transferred to the matter of the Universe and would show up in the photons that began streaming away freely at the moment of recombination.

Proofs of Big Bang Expanding galaxies: Hubble in 1929, noted that galaxies outside our own Milky Way were all moving away from an examination of the big bang theory, each at a speed proportional to its distance from us.

Just before the Big Bang

He quickly realized what this meant that there must have been an instant in time now known to be about 14 an examination of the big bang theory years ago when the entire Universe was contained in a single point in space. Those early photons — the afterglow of the Big Bang known as cosmic background radiation — can be observed today. With greatly improved resolution compared to COBE, WMAP surveyed the entire sky, measuring temperature differences of the microwave radiation that is nearly uniformly distributed across the Universe.

The picture shows a map of the sky, with hot regions in red and cooler regions in blue.

The Big Bang Theory

Planck is making the most accurate maps of the microwave background radiation yet. With instruments sensitive to temperature variations of a few millionths of a degree, and mapping the full sky over 9 wavelength bands, it measures the fluctuations of the temperature of the CMB with an accuracy set by fundamental astrophysical limits. In the beginning there was only energy. This energy got converted to small particles like photons.

As there were earlier free electrons too, these earlier photons got scattered by first electrons. But later, when electrons combined with an examination of the big bang theory and neutrons atomic nucleiatoms were formed. As then there an examination of the big bang theory no free electrons to scatter photons then the Universe became transparent!

Some unknown energy kept particles pushing apart. Meanwhile the universe started too cool too. Atoms like Hydrogen were formed. Atoms formed molecules, molecules combined to form compounds and so on. The two theories which formed the basis of the big bang theory are: If not, have a look at 2-3 reference documents.