The Word, of which all is created, said He would draw (drag in the Greek) Cosmic definition is - of or relating to the cosmos, the extraterrestrial vastness, or the universe in contrast to the earth alone. [152] In the 5th century AD, the Buddhist atomist philosopher Dignāga proposed atoms to be point-sized, durationless, and made of energy. [98], The observable universe is isotropic on scales significantly larger than superclusters, meaning that the statistical properties of the universe are the same in all directions as observed from Earth. Combined with measurements of the amount, type, and distribution of matter in the universe, the equations of general relativity describe the evolution of the universe over time.[127]. 122 Another word for universe. [96] This supercluster spans over 500 million light-years, while the Local Group spans over 10 million light-years. [103] On a mass–energy equivalence basis, the density of dark energy (~ 7 × 10−30 g/cm3) is much less than the density of ordinary matter or dark matter within galaxies. [14] Ancient Chinese philosophy encompassed the notion of the universe including both all of space and all of time. ", "To see the Universe in a Grain of Taranaki Sand", Centre for Astrophysics and Supercomputing, "Unveiling the Secret of a Virgo Dwarf Galaxy", "Hubble's Largest Galaxy Portrait Offers a New High-Definition View", "Earth's new address: 'Solar System, Milky Way, Laniakea, "Astronomers discover largest known structure in the universe is ... a big hole", "Content of the Universe – WMAP 9yr Pie Chart", "Planck captures portrait of the young universe, revealing earliest light", "Three generations of quarks and leptons", "Experiment confirms famous physics model", "Thermal history of the universe and early growth of density fluctuations", "Eternally existing self-reproducing chaotic inflationary Universe", "Relative State Formulation of Quantum Mechanics", "Weird! They are called "qualities" (guna-dharma) in both systems in the sense of absolute qualities, a kind of atomic, or intra-atomic, energies of which the empirical things are composed. Start a Jam and invite your friends and classmates to join! Other than neutrinos, a form of hot dark matter, dark matter has not been detected directly, making it one of the greatest mysteries in modern astrophysics. In another type of story, the universe is created from the union of male and female deities, as in the Maori story of Rangi and Papa. has been positive in the last 5-6 billion years. At smaller scales, galaxies are distributed in clusters and superclusters which form immense filaments and voids in space, creating a vast foam-like structure. It may seem that this conclusion is uncertain because it is based on the questionable assumptions of perfect homogeneity and isotropy (the cosmological principle) and that only the gravitational interaction is significant. [169] Edmund Halley (1720)[170] and Jean-Philippe de Chéseaux (1744)[171] noted independently that the assumption of an infinite space filled uniformly with stars would lead to the prediction that the nighttime sky would be as bright as the Sun itself; this became known as Olbers' paradox in the 19th century. If k=1, the curvature is positive and the universe has a finite volume. [23][24][25] The universe also includes the physical laws that influence energy and matter, such as conservation laws, classical mechanics, and relativity. Gravity's effects are cumulative; by contrast, the effects of positive and negative charges tend to cancel one another, making electromagnetism relatively insignificant on astronomical length scales. They were responsible for the gradual reionization of the universe between about 200-500 million years and 1 billion years, and also for seeding the universe with elements heavier than helium, through stellar nucleosynthesis. [145] Over the centuries, improvements in astronomical observations and theories of motion and gravitation led to ever more accurate descriptions of the universe. Empirical evidence for the Earth's rotation on its axis, using the phenomenon of comets, was given by Tusi (1201–1274) and Ali Qushji (1403–1474). [15] Discoveries in the early 20th century have suggested that the universe had a beginning and that space has been expanding since then,[16] and is currently still expanding at an increasing rate.[17]. Conversely, if k is zero or negative, the universe has an infinite volume. As a result, photons no longer interacted frequently with matter and the universe became transparent. on the path to systematic vocabulary improvement. The modern era of cosmology began with Albert Einstein's 1915 general theory of relativity, which made it possible to quantitatively predict the origin, evolution, and conclusion of the universe as a whole. This matter includes stars, which produce nearly all of the light we see from galaxies, as well as interstellar gas in the interstellar and intergalactic media, planets, and all the objects from everyday life that we can bump into, touch or squeeze.

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