What is the Big Bang?

Answer 1

The Big Bang Theory is the dominant scientific theory about the origin of the universe. According to the big bang, the universe was created sometime between 10 billion and 20 billion years ago from a cosmic explosion that hurled matter and in all directions.
In 1927, the Belgian priest Georges Lemaître was the first to propose that the universe began with the explosion of a primeval atom. His proposal came after observing the red shift in distant nebulas by astronomers to a model of the universe based on relativity. Years later, Edwin Hubble found experimental evidence to help justify Lemaître's theory. He found that distant galaxies in every direction are going away from us with speeds proportional to their distance.

The big bang was initially suggested because it explains why distant galaxies are traveling away from us at great speeds. The theory also predicts the existence of cosmic background radiation (the glow left over from the explosion itself). The Big Bang Theory received its strongest confirmation when this radiation was discovered in 1964 by Arno Penzias and Robert Wilson, who later won the Nobel Prize for this discovery.

Although the Big Bang Theory is widely accepted, it probably will never be proved; consequentially, leaving a number of tough, unanswered questions.

Answer 2

In physical cosmology, the Big Bang is the scientific theory that the universe emerged from a tremendously dense and hot state about 13.7 billion years ago. The theory is based on the observations indicating the expansion of space in accord with the Robertson-Walker model of general relativity, as indicated by the Hubble redshift of distant galaxies taken together with the cosmological principle.

Extrapolated into the past, these observations show that the universe has expanded from a state in which all the matter and energy in the universe was at an immense temperature and density. Physicists do not widely agree on what happened before this, although general relativity predicts a gravitational singularity.

The term Big Bang is used both in a narrow sense to refer to a point in time when the observed expansion of the universe (Hubble's law) began — calculated to be 13.7 billion (1.37 × 1010) years ago (± 2%) — and in a more general sense to refer to the prevailing cosmological paradigm explaining the origin and expansion of the universe, as well as the composition of primordial matter through nucleosynthesis as predicted by the Alpher-Bethe-Gamow theory.[1]

From this model, George Gamow was able to predict in 1948 the existence of cosmic microwave background radiation (CMB).[2] The CMB was discovered in 1964[3] and corroborated the Big Bang theory, giving it more credence over its chief rival, the steady state theory.[4]

Answer 3

The Big Bang is the theoretical beginning of the universe as we know it. Have a search on Yahoo or Google for more information. My biggest question with this is that if there was nothing before, how and where did the Big Bang take place - if there was nothing then, then how could there be something now? Just my opinion.

Answer 4

Simply put everything in our Universe was created when an infinity small singularity for some unknown reason this exploded and everything including time were pushed out and today we still live in that Universe today about 13 billion years later. Our planet is only about 4 billion years old.

Some believe that it eventually begin to collapse in upon itself and eventually the Big Crunch where the Universe gets sucked in upon itself to create another infinitely small singularity.

Another theory states that our Universe will continue to expand until it loses all of it's energy and arrives at absolute zero and all matter and energy will disappear. I prefer this theory.

My God there are a lot of uninformed answers here.

Many people believe that the planets were created then. Even stars took a long time to become. We are of a second generation star quite common in our galaxy. It is called a second generation star because it it is made up of the remnants of old stars that have super novaed.

Answer 5

It was supposed to be the beginning of time. All of the matter in the universe was compressed into one little area and then there was a "Big Bang" and all of the planets were formed.

Answer 6

a scientific theory of hoe the universe came into existence. Basically it is the idea that a tiny amount of energy suddenly changed into matter or stuff. This does seem to break the natural laws of science which state that energy can not be changed only transferred, and that matter can only come from matter. Its confusing stuff and is taught as scientific fact, but many people don think it is any more feasable than the idea of creation. Personally, I can much more easily believe that there is a God who created the universe rather than some energy which suddenly turned into the universe....

Answer 7

everything has a beginning and a title,and The Big Bang theory is a making of our existence and the creation of our world through chaos

Answer 8

The big bang is when somebody
punched you hard in the face.

Answer 9

~3 1/2 hours with Soozie Swanwaz.

Answer 10

The beginning of the earth