is slowly converging into many galaxies under the action of gravitation. In the case of gravitational attraction, the galactic space expands outward, and the more the galaxy expands, the weaker the gravitational pull of each other, the expansion of the galaxy's space will slowly accelerate. The...
The expansion of the universe was established based on observations made in the 1920's, of the Doppler shift of light from galaxies. The proportionality between velocity and distance is the famous Hubble Law. Simplified mathematical models of the universe are based on the idea, which is ...
求翻译:The scientific theory which describes the origin and evolution of the universe is Big Bang cosmology, which describes the expansion of space from an extremely hot and dense state of unknown characteristics. The universe underwent a rapid period of cosmic inflation that flattened out nearly al...
Expansion of the UniverseOur story starts 13.7 billion years ago (bya) with a very important observation: that the Universe is expanding. This is the foundation of our understanding of the past. It is the single most important fact in this story. So how do we know that it is expanding?
The Origin of the Universe The following sections are included:IntroductionExpansion of the UniverseCosmic BackgroundLight Element AbundancesHorizonsAcoustic ScaleCurrent ResearchStandard Model of CosmologyFuture of the UniverseConclusionReferences#Introduction#Ex... EL Wright - Origin and Evolution of the Uni...
The Friedmann equation 9 controls the expansion of the universe, and the conservation equation 5 controls the density of matter as the universe expands; when S˙≠0, equation 7 will necessarily hold if (5, 9) are both satisfied. Given a determinate matter description (specifying the equation ...
Oscillating means forward and backwards motion or expansion and contraction of the Universe. Universe collapses under its own weight – THE BIG CRUNCH Expansion of the Universe – THE BIG BANG VIDEO
Subsequently, the Universe was reheated to a point where elementary particles (quarks, leptons, and so on) before a gradual decrease in temperature (and density) led to theformation of the first protons and neutrons. A few minutes into the expansion, protons and neutrons combine to form primor...
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 artists concept illustrating the expansion of a portion of a flat universe The sun at the center of our solar system condensed from a ...
What process is responsible for the formation of the basic elements? Biogenesis Nucleosynthesis Singularity Abiogenesis 5. Multiple Choice 30 sec 1 pt Which of the following theory describes the period of exponential expansion of the universe prior to the more gradual expansion? Steady State Theory...