working at Mt. Wilson‚ Hubble proved that there were other galaxies existed‚ outside the Milky Way. By taking many photographs through the 100-inch reflecting Hooker telescope he devised a classification system for the various galaxies he observed. He divided galaxies into elliptical‚spiral‚barred spirals‚ and irregular galaxies.Not only that but‚ he sorted the galaxies by shape‚brightness‚ and distance; it was then he noticed redshifts in galaxies’ light emissions were moving away from each other at a
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consists of billions of galaxies that each contain billions of stars. Around some stars Planets and moons trace elliptical orbits. Within these orbits there are spherical bodies. These range in size from large asteroids to tiny particles smaller than a grain of dust‚ all of this is classified as baryonic matter by Astronomers. The fundamental core of the universe is known as the atom. During the 1970’s astronomers collected information surrounding the mass of Galaxies. They calculated this by
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Required Texts: (S) Stars: A Very Short Introduction (Very Short Introductions) [Paperback] · Publisher: Oxford University Press‚ USA (September 7‚ 2012) · ISBN-10: 0199602921 · ISBN-13: 978-0199602926 (G) Galaxies: A Very Short Introduction [Paperback] · Publisher: Oxford University Press (June 2‚ 2008) · ISBN-10: 0199234345 · ISBN-13: 978-0199234349 (P) Planets: A Very Short Introduction [Paperback] · Publisher: Oxford University Press; 1st
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birth of time and space. Hubble’s Law‚ concerning the directional movement of galaxies‚ further proves the expansion of the universe. It is said that the universe may well be “expanding” still at an enormous rate‚ and observations have shown this to be true. This is in agreement with the Big Bang Theory as an expansion means there was a starting point and time for the universe. Through the Doppler Shift effect‚ galaxies have been observed to be in ‘redshift’ when viewed from Earth‚ meaning they are
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Edwin Hubble. Hubble made the observation that the universe is continuously expanding. He discovered that a galaxy’s velocity is proportional to its distance. Galaxies that are twice as far from us move twice as fast. Another consequence is that the universe is expanding in every direction. This observation means that it has taken every galaxy the same amount of time to
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Quasars A Quasi-stellar radio source‚ also known as a 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
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Astronomers from all over the world worked together to make the observations that led to their conclusion that the universe is dying. The study was conducted as part of the Galaxy and Mass Assembly (GAMA) survey‚ the largest survey of its type to have ever taken place. The scientists in the survey measured 221‚373 galaxies to
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constellation named after a mythical princess who was rescued by Perseus. Within its boundaries is the nearest spiral galaxy to the Milky Way. What is it? 13. Aristarchus of Samos in 280 BCE was one of the earliest philosophers to suggest which model of the solar system? 14. A black hole is always surrounded by an ___________. 15. The Pinwheel Galaxy‚ a spiral galaxy located in the constellation Ursa Major‚ is also known as M101. What does the "M" stand for? 16. What is the name
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Parallax * Parallax is the apparent movement of a nearby object when it’s viewed from 2 different points. * The farther the star the smaller the angle * Distance from one side of earth orbit to other is 300km. * distance from earth to sun is 1 AU * Can only measure close stars reliably. * Parallax is very small due to distance to stars. Makes it harder to measure accurately. * Relies on no assumptions‚ only earth’s geometry around the sun. * Uses simple trigonometry
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“A Hubble Space Telescope photograph of the universe evokes far more awe for creation than light streaming through a stained glass window in a cathedral.” We know more about our universe than we ever have thanks to the Hubble Space Telescope’s clear crisp photos of objects far away in space. “Earth’s atmosphere alters and blocks the light that comes from space. Hubble orbits above Earth’s atmosphere‚ which gives it a better view of the universe than telescopes have at ground level.” (NASA‚ 2009)
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