STUDY GUIDE for PHYS 1403 online Astronomy I 1. What is the meaning of the word cosmos? 2. How many stars are in the Milky Way Galaxy? 3. How far across is the Milky Way Galaxy? 4. Where is the Sun located in the Milky Way Galaxy? 5. What is the age of the universe thought to be? 6. What is nuclear fusion? 7. Why does Carl Sagan say we are made of star stuff? 8. What is the Sun mainly made of? 9. What is an astronomical unit? Parsec? Light year? 10. What important discovery did Hubble
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refer to the same concept‚ that is to categorize hotels‚ mostly using stars as a symbol There are a wide variety of rating schemes used by different organizations around the world. Many have a system involving stars‚ with a greater number of stars indicating greater luxury. Forbes Travel Guide‚ formerly Mobil Travel Guide‚ launched its star rating system in 1958. The AAA and their affiliated bodies use diamonds instead of stars to express hotel and restaurant ratings levels. Food services‚ entertainment
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scientists. One of the main reasons a star collapses is because it has run out of fuel in the core‚ this then collapses because the fusion acts as a support force against gravity‚ also anything with mass will have a gravitational force then once the fusing process stops gravity is able to begin to compress the star. While this is happening the conservation of angular momentum takes place and the rate of spin then increases. Conservation of angular momentum is when a star is spinning on and angle and over
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consists of many free protons. H-II regions are areas where many large blue stars are formed. These blue stars would form inside a large cloud of hydrogen gas‚ giving off great amounts of ultraviolet light. This ultraviolet light then ionises the surrounding gas. The reason why they give off such enormous amounts of ultraviolet is because of their short life span. H-II regions can be several hundred
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The Red Supergiant is a huge star and also is bright red.But that is not all to the red supergiant.The red supergiant star is red because of the temperature of the star.The hotter the star it is blue but when it is medium temperature it takes a red color.The shells on the red supergiant can expand when going through fusion. The red supergiant has already consumed all of its supply of hydrogen.After that helium starts to form in the core.The outer shells go through nuclear fusion making them expand
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* Compare the views of Hubble and Friedman about the expansion of the universe: Edwin Hubble’s observation In 1929‚ Edwin Hubble announced that his observations of galaxies outside our own Milky Way showed that they were systematically moving away from us with a speed that was proportional to their distance from us. The more distant the galaxy‚ the faster it was receding from us. The universe was expanding after all‚ just as General Relativity originally predicted! Hubble observed that the light
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ASTROPHYSICS Galaxy = collection of large number of stars‚ mutually attracting each other through the gravitational force and staying together No. Of stars varies between a few million and hundreds of billions. There are approximately 100bn galaxies in the universe 3 types of galaxies: 1. Spiral (Milky Way) 2. Elliptical (M49) 3. Irregular (Magellanic Clouds) – Anything that is not elliptical or spiral = irregular. No specific structure‚ Large and small Magellanic clouds are
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small‚ and circular dots which I later learned were a popular binary star named Algeria. At first‚ I could barely see the stars but after focusing my eye in the telescope I noticed that one star was a light blue shade and the other star was a vibrant yellow color. Additionally‚ the yellow star was significantly brighter‚ more visible‚ and larger than the tiny‚ dull blue star. When I typically look up in the sky‚ I notice how most stars have a similar shape and size with the same white color and vibrancy
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Sciences ABSTRACT The Milky way is a band of light that has millions of stars that are combined together and that spans 100‚000 light years away. They say the Milky Way is about 14 billion years old. How they figured this out by measuring the ages of each star. They have found trace elements of hydrogen and helium so we know that the Milky Way was formed an early in the history. Another good way to find the age of the stars in the Milky Way is measuring thorium because it has a half-life of 14 billions
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Intro : “There are no international unified standards for awarding stars to hotels‚” said Sergei Korneyev‚ director for the northwest at the Russian Tourism Industry Union. * Each country has its own system‚ and it is very inconvenient for tourists‚ since‚ for example‚ Egyptian stars differ from European ones. There have been many misunderstandings. WHAT IS : An hotel ranking is a system‚ taking into account a full range of factors including quality of accommodation‚ range of amenities‚ standards
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