Big Bang. History.bigbang.jpg (JPEG Image, 1361 × 919 pixels) - Scaled (67%) Big Bang. According to the Big Bang model, the universe expanded from an extremely dense and hot state and continues to expand today. The graphic scheme above is an artist's concept illustrating the expansion of a portion of a flat universe. The Big Bang is the scientific theory that is most consistent with observations of the past and present states of the universe, and it is widely accepted within the scientific community. It offers a comprehensive explanation for a broad range of observed phenomena, including the abundance of light elements, the cosmic microwave background, large scale structure, and the Hubble diagram.[3] The core ideas of the Big Bang—the expansion, the early hot state, the formation of light elements, and the formation of galaxies—are derived from these and other observations.
As the distance between galaxies increases today, in the past galaxies were closer together. Overview Timeline of the Big Bang The earliest phases of the Big Bang are subject to much speculation. The Big Bang. The Big Bang Watch a video or read the story of the history of the Universe. Astronomers combine mathematical models with observations to develop workable theories of how the Universe came to be. The mathematical underpinnings of the Big Bang theory include Albert Einstein's general theory of relativity along with standard theories of fundamental particles. Today NASA spacecraft such as the Hubble Space Telescope and the Spitzer Space Telescope continue measuring the expansion of the Universe. One of the goals has long been to decide whether the Universe will expand forever, or whether it will someday stop, turn around, and collapse in a "Big Crunch?
" Background Radiation According to the theories of physics, if we were to look at the Universe one second after the Big Bang, what we would see is a 10-billion degree sea of neutrons, protons, electrons, anti-electrons (positrons), photons, and neutrinos. Missions Study Cosmic Background Radiation The Universe's "baby picture". Inflation. Future - Science & Environment - Gravitational waves: written in the stars? Examining the contours of burned-out remnants of stars could provide direct evidence for two of the most sought-after phenomena in fundamental physics. One thing physics has taught us is that events at the smallest possible scales can have consequences of cosmic proportions.
And, in turn, studying some of the universe’s most spectacular astrophysical phenomenon can reveal a lot about physics at its most elementary level. The latest example of this has been proposed by a team of researchers in Europe – they say that studying the contours of burned-out remnants of stars thousands of light years away could provide concrete evidence for two of the most sought-after phenomena in fundamental physics. The first phenomenon, gravitational waves, was predicted by Einstein’s theory of general relativity, which explained the force of gravity as a curvature in spacetime induced by mass. Catching a wave Nonetheless, scientists think this might be detectable. Extreme matter. Bigbang.jpg (JPEG Image, 1920 × 1080 pixels) - Scaled (57%)