Cosmic Microwave Background Radiation The Big Bang theory predicts that the early universe was a very hot place and that as it expands‚ the gas within it cools. Thus the universe should be filled with radiation that is literally the remnant heat left over from the Big Bang‚ called the “cosmic microwave background radiation”‚ or CMB. The CMB is an almost-uniform background of radio waves that fill the universe. The CMB is‚ in effect‚ the leftover heat of the Big Bang itself - it was released when
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The Cosmic Microwave Background Radiation Perhaps the most conclusive (and certainly among the most carefully examined) piece of evidence for the Big Bang is the existence of an isotropic radiation bath that permeates the entire Universe known as the "cosmic microwave background" (CMB). The word "isotropic" means the same in all directions; the degree of anisotropy of the CMB is about one part in a thousand. In 1965‚ two young radio astronomers‚ Arno Penzias and Robert Wilson‚ almost accidentally
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SCIENCE-‐1 TERM PAPER The new Physics of Cosmic Redshift Introduction:As we all know that light travels from source in a straight line(ray) according to concepts of classical ray optics. Redshift is the phenomenon by which light rays from distant stars that are observed on earth‚ show smaller frequency (longer wavelength) i.e. shifted towards the “red” end of the visible light region. This phenomenon of redshift is conventionally explained by the well-known “Doppler effect”. But
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galaxies‚ and the heavier elements were synthesized either within stars or during supernovae. The Big Bang theory 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 Hubble’s Law.[3] As the distance between galaxies increases today‚ in the past galaxies were closer together. The known laws of nature can be used to calculate the characteristics of the universe in detail back
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Lesson 1 Key Question Answers 1. What does Hubble’s law predict about the speed of a galaxy far away from the Milky Way compared to one that is closer? Hubble’s law predicted that galaxies were moving away from earth at a rate proportional to their distance from us. The farther away from the Milky Way a galaxy is‚ the larger the redshift is. The farther away a galaxy is‚ the faster it is moving away. Conversely‚ blueshifted galaxies‚ such as Andromeda‚ are moving closer to the Milky Way.
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What is the age an origin of our universe? The issue to be discussed in the following paper is the 3 theories of how the universe started‚ the Doppler Effect‚ the age of the universe‚ the origin of the universe‚ red shift/blue shift and dark matter/dark energy. The Doppler Effect is a change in frequency and wave length of a wave. It’s caused by the change in distance between the thing creating the wave and whatever it’s measuring‚ seeing and hearing the wave. The universe was created over 14
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that this theory does indeed have issues. Regardless of the issues‚ being backed by an overwhelming pile of evidence leads it to be the most widely supported theory among all scientists across the universe itself. Among the evidence is a study upon radiation and most importantly‚ a study involving the Doppler Affect. The theory itself does have flaws; however‚ considering the vast amount of evidence‚ our population’s majority believes in the big bang theory and scientists today are trying their hardest
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first quasar discovered? The first quasar was discovered in the 1950’s. 2. What is the theory of the existence of quasars? In 1965‚ Jim Gunn and Bruce Peterson of Caltech predicted that distant quasars should show evidence of the end of the cosmic dark ages. But until recently‚ no one had ever seen an object distant enough to check their prediction 3. Where can we find quasars and what are the main characteristics? Quasars have little or no visible angular extent. Quasars have rapid light
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The Cosmic Perspective‚ 7e (Bennett et al.) Chapter 22 The Birth of the Universe 22.1 Multiple-Choice Questions 1) To date‚ physicists have investigated the behavior of matter and energy at temperatures as high as those that existed in the universe as far back as ________ after the Big Bang. A) 1 million years B) 300‚000 years C) 300 years D) 3 minutes E) 10-10 second Answer: E 2) How long after the Big Bang was the Planck time‚ before which our current theories are completely unable
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The Big Bang theory is today’s dominant scientific theory about the origin of the universe. It states that the universe was created from an infinitely hot and dense subatomic ball‚ which once exploded not only created energy and matter‚ but space and time itself. This is estimated to have happened around 14 billion years ago. 300‚000 years after the big bang took place the plasma of elementary particles had cooled to 3000K‚ during which atoms began to form as electrons came into orbit around protons
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