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The particle horizon is the maximum distance from which light from particles could have traveled to the observer in the age of the universe.
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The Group of 77 (G77) at the United Nations (UN) is a coalition of developing countries, designed to promote its members' collective economic interests and ...
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A cosmological horizon is a measure of the distance from which one could possibly retrieve information. This observable constraint is due to various ...
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The horizon problem is a cosmological fine-tuning problem within the Big Bang model of the universe. It arises due to the difficulty in explaining the ...
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The Higgs boson, sometimes called the Higgs particle, is an elementary particle in the Standard Model of particle physics produced by the quantum excitation ...
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The horizon is the apparent curve that separates the surface of a celestial body from its sky when viewed from the perspective of an observer on or near the ...
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1977 (MCMLXXVII) was a common year starting on Saturday of the Gregorian calendar, the 1977th year of the Common Era (CE) and Anno Domini (AD) designations, ...
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In astrophysics, an event horizon is a boundary beyond which events cannot affect an observer. Wolfgang Rindler coined the term in the 1950s.
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