Some of these mysteries and problems have been resolved while others are still outstanding. However, special relativity does not apply beyond motion through space.

If the expansion of the universe continues to accelerate, there is a future horizon as well.According to the Big Bang theory, the universe at the beginning was very hot and very small, and since then it is expanding and cooling down. For the American TV sitcom, see "[The] big bang picture is too firmly grounded in data from every area to be proved invalid in its general features. The results disproved several specific cosmic inflation models, but are consistent with the inflation theory in general.Using the Big Bang model, it is possible to calculate the concentration of The measured abundances all agree at least roughly with those predicted from a single value of the baryon-to-photon ratio. (Guth is not affiliated with that study. At its simplest, it says the universe as we know it started with a small singularity, then inflated over the … )"It's not impossible, so I think there's still certainly research that needs to be done.

However, Hoyle later denied that, saying that it was just a striking image meant to emphasize the difference between the two theories for radio listeners.Strictly, dark energy in the form of a cosmological constant drives the universe towards a flat state; however, our universe remained close to flat for several billion years before the dark energy density became significant. More recent evidence includes observations of Precise modern models of the Big Bang appeal to various exotic physical phenomena that have not been observed in terrestrial laboratory experiments or incorporated into the Standard Model of particle physics. "The basic takeaway has not changed; we have high confidence in our results," Kovac said in a The results from Planck were put online in pre-published form in September. In the first second after the universe began, the surrounding temperature was about 10 billion degrees Fahrenheit (5.5 billion Celsius), This early soup would have been impossible to look at, because light could not carry inside of it. 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. These two clouds of gas contain no elements heavier than hydrogen and deuterium.The age of the universe as estimated from the Hubble expansion and the CMB is now in good agreement with other estimates using the ages of the oldest stars, both as measured by applying the theory of The prediction that the CMB temperature was higher in the past has been experimentally supported by observations of very low temperature absorption lines in gas clouds at high redshift.As with any theory, a number of mysteries and problems have arisen as a result of the development of the Big Bang theory. Prior to that moment there was nothing; during and after that moment there was something: our universe.

Astronomers can, however, see the "echo" of the expansion through a phenomenon known as the While the majority of the astronomical community accepts the theory, there are some theorists who have 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.

"While we can understand how the universe we see came to be, it's possible that the Big Bang was not the first inflationary period the universe experienced. As it continued to cool, it wou… Theory says that in the first second after the universe was born, our cosmos ballooned faster than the In 2014, astronomers said they had found evidence in the CMB concerning "B-modes," a sort of "We're very confident that the signal that we're seeing is real, and it's on the sky," lead researcher John Kovac, of the Harvard-Smithsonian Center for Astrophysics, told Space.com in March 2014.But by June, the same team said that their findings could have been altered by galactic dust getting in the way of their field of view. Many particle physics candidates for dark matter have been proposed, and several projects to detect them directly are underway.Additionally, there are outstanding problems associated with the currently favored cold dark matter model which include the dwarf galaxy problemThe horizon problem results from the premise that information cannot travel A resolution to this apparent inconsistency is offered by inflationary theory in which a homogeneous and isotropic scalar energy field dominates the universe at some very early period (before baryogenesis). Proposals in the last two categories see the Big Bang as an event in either a much larger and As a description of the origin of the universe, the Big Bang has significant bearing on religion and philosophy. In the most common models the universe was filled homogeneously and isotropically with a very high The universe continued to decrease in density and fall in temperature, hence the typical energy of each particle was decreasing. Of these features, Hubble's law has two possible explanations. In 2000–2001, several experiments, most notably In early 2003, the first results of the Wilkinson Microwave Anisotropy Probe were released, yielding what were at the time the most accurate values for some of the cosmological parameters. In addition, the assumption that the universe is mostly normal matter led to predictions that were strongly inconsistent with observations. In the "multiverse" model, different universes would coexist with each other like bubbles lying side by side.