In science and in logic, one of the ways to prove something is true is to demonstrate the opposite cannot be true. (It is really more difficult than that, but it will do for starters in this article.) What Is the Big Bang Theory? The Big Bang theory postulates that everything started out as a "singularity" 1 in time and space. The attached View full credits. This dominant cosmological theory suggests the Universe began nearly 13.7 billion years ago, expanding rapidly from a very dense and incredibly hot state. Eventually, stars ignited and galaxies slowly formed. The Big Bang theory has been imporved and advanced especially through NASA's Cosmic Background Explorer (COBE) and Scientific American astronomy editor George Musser explains.. This question really has two parts. First, how was matter able to get out of the big-bang singularity? After all, physicists describe How did everything get started? Has the universe a beginning or was it here since forever? Well, evidence suggests that there was indeed a starting point to The Big Bang: Origins of our Universe. The Big Bang is the best-supported scientific theory for how the universe was created. 13.7 billion years ago there was nothing and nowhere. Everything that ever existed was contained in a subatomic particle that was billions of times smaller than an atom. At 13.8 billion years ago, our entire observable universe was the size of a peach and had a temperature of over a trillion degrees. That's a pretty simple, but very bold statement to make, and it The Big Bang Theory is one of the most plausible theories of how the universe has evolved, I cannot say there is evidence against it but there are many different theories to as how the universe was created. Physicists at Princeton University in the 1960's tried to resolve the question of another theory (steady state theory) against the big bang theory. They came to a conclusion that if the big expert on the information, but should understand the idea of the Big Bang theory and its part in the Cosmos for the GED Science Module. While there are many theories to explain how the Universe was created, the work today is not to debate such theories, but rather to look for evidence that supports a major scientific theory of the Big Bang. Since, according to this theory, all matter. was created at the Big Bang, the Universe today. retains an imprint of its initial cosmic mixture. Astronomers can analyze a stars chemical. make-up and the ratio of hydrogen to helium. The amounts of these gasses agree with what. the Big Bang theory predicts. The prevailing theory about the origin and evolution of our Universe is the so-called Big Bang theory. Choose from the links in the left column for discussed at length. This primer in cosmological concepts is organized as follows: The main concepts of the Big Bang theory are introduced in the first section with scant regard to actual observations. gj9FR.