quasar‚ is an extremely distant nucleus to an active galaxy. They are the furthest objects away from our galaxy that can be seen‚ but are visible to us because they are the brightest matter in our universe. Quasars are known to have an extremely high redshift. Though we have not been observing quasars for long enough to determine how they are born‚ they are believed to have been formed by supermassive black holes consuming an enormous amount of matter. This matter forms an accretion disc around the black
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rays‚ radio e) radio‚ X rays‚ visible light‚ ultraviolet‚ infrared‚ gamma rays 5. Evidence of the expansion of the universe is shown by a) the Einstein Cross b) the 4.5 billion year age of the Earth c) the abundances of the elements in stars d) the redshifts of distant galaxies e) time dilation 6. Suppose we look at two distant galaxies: Galaxy 1 is twice as far away as Galaxy 2. In that case‚ a) Galaxy 1 must be twice as big as Galaxy 2 b) we are seeing Galaxy 1 as it looked at an earlier time in the
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In the initial announcement of his discovery‚ Art Hoag proposed the hypothesis that the visible ring was a product of gravitational lensing. This idea was later discarded because the nucleus and the ring have the same redshift‚ and because more advanced telescopes revealed the knotty structure of the ring‚ something that would not be visible if the ring were the product of gravitational lensing. Many of the details of the galaxy remain a mystery‚ foremost of which is
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1. The original Big Bang model had three major problems. The ’fix’ that solved them is known as _________. COSMIC INFLATION THEORY 2. When light from a hot solid‚ liquid‚ or dense gas passes through a cooler gas‚ it will produce a/an _________ spectrum. ATOMIC SPECTRUM 3. One name that has been given the mysterious force apparently responsible for driving the acceleration of the universe’s expansion is _________. DARK ENERGY 4. The area on the H-R diagram where “normal” stars can be found
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Edwin Hubble was born on November 20‚ 1889‚ in Marshfield‚ Missouri. Edwin Hubble served in World War One and also graduated from the University of Chicago. He went down the road in the research in the field of astrophysics at Mount Wilson Observatory in California. He found out a constant relationship between galaxies that helped prove that our universe keeps expanding. Hubble made a classification system that classifies the galaxies that have been used by other researchers for years. Edwin
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galaxies don’t produce much radiation‚ but if there are sources like quasars in the background they can be studied in great detail. Quasars are a very energetic active galactic nucleus‚ they are very luminous‚ and they were first indentified as being redshift sources of electromagnetic sources. Most quasars are known to be three billion light years away. When stars die they leave behind compact objects of some sort like white dwarf or neutron stars. White dwarf is a stellar remnant composed of electron
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Characterizing the Most Extreme Emission Line Galaxies Spring 2014 UROP Proposal Ian Jaeger Background During the first 379‚000 years (redshift z = 1089) after the Big Bang‚ the matter of the universe consisted primarily of free protons‚ electrons and photons. After the matter had cooled and spread out‚ these particles combined to form hydrogen and allowed the photons to freely travel without interacting with free electrons‚ forming what we know of today as the Cosmic Microwave Background (CMB).
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Science of Stars Nancy Vasquez SCI 151 September 23‚ 2012 Robert Austin Abstract When discussing the Solar System‚ the planets are what are mostly thought of. Many other objects orbit around the sky such as stars‚ asteroids and meteors. Stars have many properties of which will be discussed throughout this paper. Properties of Stars * Stars are determined by their brightness‚ distance‚ luminosity‚ radius‚ chemical composition and temperature (Strobel‚ 2007). * When determining
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constant to his equations that made his calculations consistent with a static universe. (Expanding universe‚ n.d.) Einstein admitted this was a great mistake when Edwin Hubble demonstrated that the more distant a galaxy is from earth‚ the greater its redshift and therefore the faster it moves away from us. The velocity of galaxies that are moving away from us can be given by an equation known as Hubble’s law: v = H*d. (Martin White‚ n.d.) Where V represents velocity‚ H represents Hubble’s constant and
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measured in watts (1 watt = 1 joule/s). Wavelength - The distance between adjacent peaks (or troughs) of a wave. Frequency – The rate at which peaks of a wace pass by a point‚ measured in units of 1/s often called cycles per second or hertz. Redshift – (Doppler) A Doppler shift in which spectral features are shirted to longer wavelengths‚ observed when an object is moving away from the observer. Focal plane – The place where an image created by a lens or mirror is in focus. Light pollution
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