What is Big Bang theory:
The Big Bang theory is nothing but it explains how our universe is made.The Big Bang Theory is the leading explanation about how the universe began. At its simplest, it says the universe as we know it started with a small singularity, then inflated over the next 13.8 billion years to the cosmos that we know today.
Because current instruments don't allow astronomers to peer back at the universe's birth, much of what we understand about the Big Bang Theory comes from mathematical formulas and models. Astronomers can, however, see the "echo" of the expansion through a phenomenon known as the cosmic microwave background.
The Big Bang model is the most widely acceptable cosmological theory of the early formation of the universe.According to this theory,the Universe is created about 13,700 million years ago.Big Bang occurred from an expansion of something infinitely small.
The Big Bang theory says that the universe was very hot and concentrated in its remote past.But with time goes on ,space has been expanded and cooled.In the beginning the Earth was so hot that the four fundamental forces of Nature (Gravity,Electromagnetism,strong Nuclear force and weak Nuclear force) were a single force.
The Big Bang theory was originally filled in 1927 by George Lemaitre as the "Hypothesis of the primeval atom".He was a physicist and an astronomer as well as Catholic Preist.Einstein said to him:"Your calculations are correct ,but your understanding to Physics is abominable".
Lemaitre gave no importance to Einstein's words and continued his work until 1993 and satisfied Einstein that his findings was admirable.Albert Einstein said that the most incomprehensible thing about the Universe is that it is comprehensible.
Beyond our imagination:
Do you know that our huge universe was smaller than the atom?
In the beginning, the universe was smaller and hotter than a chili seed. Much smaller. Smaller than tiny, more miniature than microscopic, and hotter than hot. It was smaller, denser, and had more potential energy than anything else we know of throughout existence.Inside the invisible seed, this primordial microscopic nut, the forces of nature were unified, joined into a single field by the extremely extreme conditions they found themselves in. As things began to open up, one by one, the forces of nature separated.
The first to go was the big one, the one that holds all the big things together – Gravity. It shapes our universe on a galactic scale, whilst also keeping your feet firmly on the ground. Despite the fact that it is absolutely everywhere, we still don’t fully understand it. Some think gravity is substantially different from the other forces, that it has always been a separate force in our universe, and that its effect can travel and disappear into other realities.
Whether Gravity was part of the Grand Unification or not, at some point there were three forces bound together, which we shall call the Strong Unification. But they didn’t like being squeezed together all that much, so given a little more space, a powerful member broke off from the trinity – the Strong force.
The Strong Force is called the Strong Force because it is strong. It works invisibly on the tiniest of scales, mightily binding together the atoms in every object you can see around you. Without it, everything would simply fall apart into a gloop of subatomic bits.The Strong force’s split from the other two was something of a big deal. When it left, it unleashed unprecedented quantities of energy in all directions and set off the most important event of the ever-so-young universe. In the blink of an eye, as quick as a bursting balloon seen in reverse, the universe inflated.
Formation of the universe:
In the first second after the universe began, the surrounding temperature was about 10 billion degrees Fahrenheit (5.5 billion Celsius), according to NASA. The cosmos contained a vast array of fundamental particles such as neutrons, electrons and protons. These decayed or combined as the universe got cooler.This early soup would have been impossible to look at, because light could not carry inside of it. "The free electrons would have caused light (photons) to scatter the way sunlight scatters from the water droplets in clouds," NASA stated. Over time, however, the free electrons met up with nuclei and created neutral atoms. This allowed light to shine through about 380,000 years after the Big Bang.
Over a long period of time, the slightly denser regions of the nearly uniformly distributed matter gravitationally attracted nearby matter and thus grew even denser, forming gas clouds, stars, galaxies, and the other astronomical structures observable today.The details of this process depend on the amount and type of matter in the universe. The four possible types of matter are known as cold dark matter, warm dark matter and hot dark matter.The best measurements available (from WMAP) show that the data is well-fit by a Lambda-CDM model in which dark matter is assumed to be cold (warm dark matter is ruled out by early re-ionization),and is estimated to make up about 23% of the matter/energy of the universe, while bar-ionic matter makes up about 4.6%.In an "extended model" which includes hot dark matter in the form of neutrinos, then if the "physical baryon density" Ωbh2 is estimated at about 0.023 (this is different from the 'baryon density' Ωb expressed as a fraction of the total matter/energy density, which as noted above is about 0.046), and the corresponding cold dark matter density Ωch2 is about 0.11, the corresponding neutrino density Ωvh2 is estimated to be less than 0.0062.
Other important facts:
The phrase "Big Bang Theory" has been popular among astrophysicists for decades, but it hit the mainstream in 2007 when a comedy show with the same name premiered on CBS. The show follows the home and academic life of several researchers (including an astrophysicist).
The results from Planck were put online in pre-published form in September. By January 2015, researchers from both teams working together "confirmed that the Bicep signal was mostly, if not all, stardust," the New York Times said in another article.
Examining the CMB also gives astronomers clues as to the composition of the universe. Researchers think most of the cosmos is made up of matter and energy that cannot be "sensed" with conventional instruments, leading to the names dark matter and dark energy. Only 5 percent of the universe is made up of matter such as planets, stars and galaxies.
This early light — sometimes called the "afterglow" of the Big Bang — is more properly known as the cosmic microwave background (CMB). It was first predicted by Ralph Alpher and other scientists in 1948, but was found only by accident almost 20 years later.The cosmic microwave background has been observed on many missions. One of the most famous space-faring missions was NASA's Cosmic Background Explorer (COBE) satellite, which mapped the sky in the 1990's.
The Big Bang theory is nothing but it explains how our universe is made.The Big Bang Theory is the leading explanation about how the universe began. At its simplest, it says the universe as we know it started with a small singularity, then inflated over the next 13.8 billion years to the cosmos that we know today.
Because current instruments don't allow astronomers to peer back at the universe's birth, much of what we understand about the Big Bang Theory comes from mathematical formulas and models. Astronomers can, however, see the "echo" of the expansion through a phenomenon known as the cosmic microwave background.
The Big Bang model is the most widely acceptable cosmological theory of the early formation of the universe.According to this theory,the Universe is created about 13,700 million years ago.Big Bang occurred from an expansion of something infinitely small.
The Big Bang theory says that the universe was very hot and concentrated in its remote past.But with time goes on ,space has been expanded and cooled.In the beginning the Earth was so hot that the four fundamental forces of Nature (Gravity,Electromagnetism,strong Nuclear force and weak Nuclear force) were a single force.
The Big Bang theory was originally filled in 1927 by George Lemaitre as the "Hypothesis of the primeval atom".He was a physicist and an astronomer as well as Catholic Preist.Einstein said to him:"Your calculations are correct ,but your understanding to Physics is abominable".
Lemaitre gave no importance to Einstein's words and continued his work until 1993 and satisfied Einstein that his findings was admirable.Albert Einstein said that the most incomprehensible thing about the Universe is that it is comprehensible.
Beyond our imagination:
Do you know that our huge universe was smaller than the atom?
In the beginning, the universe was smaller and hotter than a chili seed. Much smaller. Smaller than tiny, more miniature than microscopic, and hotter than hot. It was smaller, denser, and had more potential energy than anything else we know of throughout existence.Inside the invisible seed, this primordial microscopic nut, the forces of nature were unified, joined into a single field by the extremely extreme conditions they found themselves in. As things began to open up, one by one, the forces of nature separated.
The first to go was the big one, the one that holds all the big things together – Gravity. It shapes our universe on a galactic scale, whilst also keeping your feet firmly on the ground. Despite the fact that it is absolutely everywhere, we still don’t fully understand it. Some think gravity is substantially different from the other forces, that it has always been a separate force in our universe, and that its effect can travel and disappear into other realities.
Whether Gravity was part of the Grand Unification or not, at some point there were three forces bound together, which we shall call the Strong Unification. But they didn’t like being squeezed together all that much, so given a little more space, a powerful member broke off from the trinity – the Strong force.
The Strong Force is called the Strong Force because it is strong. It works invisibly on the tiniest of scales, mightily binding together the atoms in every object you can see around you. Without it, everything would simply fall apart into a gloop of subatomic bits.The Strong force’s split from the other two was something of a big deal. When it left, it unleashed unprecedented quantities of energy in all directions and set off the most important event of the ever-so-young universe. In the blink of an eye, as quick as a bursting balloon seen in reverse, the universe inflated.
Formation of the universe:
In the first second after the universe began, the surrounding temperature was about 10 billion degrees Fahrenheit (5.5 billion Celsius), according to NASA. The cosmos contained a vast array of fundamental particles such as neutrons, electrons and protons. These decayed or combined as the universe got cooler.This early soup would have been impossible to look at, because light could not carry inside of it. "The free electrons would have caused light (photons) to scatter the way sunlight scatters from the water droplets in clouds," NASA stated. Over time, however, the free electrons met up with nuclei and created neutral atoms. This allowed light to shine through about 380,000 years after the Big Bang.
Over a long period of time, the slightly denser regions of the nearly uniformly distributed matter gravitationally attracted nearby matter and thus grew even denser, forming gas clouds, stars, galaxies, and the other astronomical structures observable today.The details of this process depend on the amount and type of matter in the universe. The four possible types of matter are known as cold dark matter, warm dark matter and hot dark matter.The best measurements available (from WMAP) show that the data is well-fit by a Lambda-CDM model in which dark matter is assumed to be cold (warm dark matter is ruled out by early re-ionization),and is estimated to make up about 23% of the matter/energy of the universe, while bar-ionic matter makes up about 4.6%.In an "extended model" which includes hot dark matter in the form of neutrinos, then if the "physical baryon density" Ωbh2 is estimated at about 0.023 (this is different from the 'baryon density' Ωb expressed as a fraction of the total matter/energy density, which as noted above is about 0.046), and the corresponding cold dark matter density Ωch2 is about 0.11, the corresponding neutrino density Ωvh2 is estimated to be less than 0.0062.
Other important facts:
The phrase "Big Bang Theory" has been popular among astrophysicists for decades, but it hit the mainstream in 2007 when a comedy show with the same name premiered on CBS. The show follows the home and academic life of several researchers (including an astrophysicist).
The results from Planck were put online in pre-published form in September. By January 2015, researchers from both teams working together "confirmed that the Bicep signal was mostly, if not all, stardust," the New York Times said in another article.
Examining the CMB also gives astronomers clues as to the composition of the universe. Researchers think most of the cosmos is made up of matter and energy that cannot be "sensed" with conventional instruments, leading to the names dark matter and dark energy. Only 5 percent of the universe is made up of matter such as planets, stars and galaxies.
This early light — sometimes called the "afterglow" of the Big Bang — is more properly known as the cosmic microwave background (CMB). It was first predicted by Ralph Alpher and other scientists in 1948, but was found only by accident almost 20 years later.The cosmic microwave background has been observed on many missions. One of the most famous space-faring missions was NASA's Cosmic Background Explorer (COBE) satellite, which mapped the sky in the 1990's.
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