LIFE CYCLE OF A STAR Stars are formed in nebulae‚ interstellar clouds of dust and gas (mostly hydrogen). These stellar nurseries are abundant in the arms of spiral galaxies. In these stellar nurseries‚ dense parts of these clouds undergo gravitational collapse and compress to form a rotating gas globule. The globule is cooled by emitting radio waves and infrared radiation. It is compressed by gravitational forces and also by shock waves of pressure from supernova or the hot gas released
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Heinemann Physics Content and Contexts Units 3A and 3B Worked solutions Unit 3B Contents The sounds of music The search for understanding Chapter 5 Wave properties and light 5.1 Wave properties 5.2 Wave behaviour 5.3 Wave interactions 5.4 Electromagnetic radiation 5.5 Electromagnetic radiation and matter 5.6 X-rays Chapter 5 Review 2 6 15 15 15 17 19 22 25 27 Chapter 6 Matter‚ relativity and astronomy 6.1 Extending our model of matter 6.2 Einstein’s special theory of relativity 6.3
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‘Solar panels’‚ as they are usually called‚ are now quite a common sight here on Earth‚ but they were first used in space in 1958 to power the ‘Vanguard’ satellite. Principles of solar satellites In photovoltaic cells‚ such as the Hubble Space Telescope silicon solar cell shown here‚ the basic materials‚ the doping and the shape of the junction are chosen in such a way as to increase their capability of transforming the light energy into electrical energy. Each cell is capable of producing a small
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and even average people have wondered if there is such thing as life on other planets. Many dedicate all of their time to researching extraterrestrial life. Some believe researching something we have no proof of is a waste of time. Modern day telescopes have detected Earth-sized planets orbiting nearby stars. An ancient Martian rock shows signs of life‚ and scientists wonder if Jupiter’s moon Europa contains life in its oceans. The idea that there is even a tiny hint of life that we share the universe
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Chapter 1 1.1 Earth Science & the Earth System -Earth science is the study of Earth and the processes that shape it -The earth system is composed of four principal components: atmosphere (air‚ weather)‚ hydrosphere (water‚ ice)‚ biosphere (plants‚ animals)‚ and geosphere (land‚ rocks). - Earth science can be broadly defined as the investigation of interactions among the four parts of the earth system. - The second largest earthquake ever recorded buckled the seafloor west of Sumatra‚ Indonesia
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Galileo and Copernicus were two extremely influential astronomers. They believed in the heliocentric model of our solar system‚ or the idea that the planets revolved around the Sun. We all accept this model today as fact‚ but back in their time‚ the thought of it was pure blasphemy. The widely accepted idea at the time‚ as supported by the almighty Catholic Church‚ was the geocentric model. In this model‚ the Earth is central to nearly everything‚ and is orbited by the Sun‚ moon‚ and other special
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black holes...and supermassive black holes‚ equivalent to millions of stars in mass and located in the centers of galaxies." (Cosmic 132) The "primordial" black holes have only been theorized; created by the big bang. (Cosmic 110) The Hubble space telescope‚ on the other hand‚ has photographed supermassive black holes. Our own galaxy‚ the Milky Way‚ has a black hole in its center‚ having
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Comparisons: Novel to Movie After reading A Walk to Remember and then watching the movie you realize how completely different they are. Some of the times that I teared up or cried in the book are different that the movie. I think that after you watch the movie it gives you a better appreciation of the book because it is more touching than the movie. The main point where I felt that the book was more touching was when Jamie gives Landon her mother’s bible. She carried it where ever she went
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References: David L. Butts‚Galileo and the telescope :Naturalistic representations in Visual astronomy‚ volume 1‚ 2006 Online Gallery of vangogh
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The Sleep of Reason Produces Monsters- The Infinite Conflict of Reason In his painting titled “The Sleep of Reason Produces Monsters‚” Francisco de Goya illustrates a horrific image of a man sleeping while being attacked by “monsters” as a product of his failure to create. Yet Goya ‘s depiction does more than merely tell a story. When analyzed in the historical context‚ the painting beckons and outlines much of the rhetoric of the enlightenment period - that human reason will produce progress
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