Stellar evolution

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    Ejnar Hertzsprung and Henry Norris Russel developed a vital tool used to study stellar evolution, a scatter graph that plots a star’s spectral type respective to their absolute magnitude, which is the observational Hertzsprung-Russel Diagram, or the temperature of stars relative to its luminosity, the theoretical H-R diagram. Stars have specific evolutionary stages based on their initial mass, dictating its internal structure and means of energy production. The phases in stellar evolution correspond to alterations in luminosity and temperature. There are three main regions present on the diagram, the most dominant is the main sequence which is where approximately 90% of all known stars lie and extends from the bottom right-hand corner to the…

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    Stars Compare And Contrast

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    Laying on the fresh cut grass of your lawn, you watch the sun sink behind the mountains as day subtly fades into night. There is always a minute of darkness as the city holds its breath. No street lights. No cars. Just you and the sky and… the faint glow of a star. Seeing the first star that night, you make a wish and remember the first time you saw one. You still wonder what that speck of light is—How it got to be up there, why it sometimes is so bright and other times so faint, and how it…

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    developed her own classification signifying the comparison with Fleming's and Pickering work as difficulties arose when Pickering could not understand Maury's claim on theoretical concerns that inspired her scheme. This lead to Annie Jump Cannon to continue in 1911 to expand on her research she started in 1901 beginning with an examination of bright southern hemisphere stars using a magnifying loupe. She could distinguish stars down to 9th magnitude, about 16 times fainter than the human eye can…

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    Nuclear Fusion

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    Stage Four: Protostar By this stage of the stars evolution, 100,000 years after the process began, it can now be plotted on the Hertzsprung-Russell diagram, which is used to compare the many different stars. Although it is still not fully formed, we are able to determine the type of star it will become based on its luminosity and temperature. In the nucleus of the condensed cloud, which could now fit within the orbit of Mercury at less than 58,000,000 km wide, electrons and protons are ripped…

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    Creation vs. Evolution Creation and evolution have always been argued head to head. Creationism and evolution, both cannot be proved scientifically yet. Creationism is common among people with a belief in God or another god/deity. They believe in the straightforward interpretation of the bible. Evolutionists though believe in what is the big bang theory which simply states that all things came from nothing. There are many other groups of people in these two major groups but they all have the…

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    Dr. Ham's Creation Debate

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    Dr. Nye made it abundantly clear that he was a man of faith in evidence, and from fossil records to fulfilled prediction made by science it appeared he held the upper hand on Dr. Ham in regard to the age of the earth. However, because that was not the topic of the debate he will not receive a reward for his stellar presentation. Dr. Nye believe that the two theories (creation/evolution) were mutually exclusive, one talked about the origin of life from the top on down(creation); while the other…

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    Justin Dubler August 31, 2015 Mrs. Werle Period #1-2 AP Biology Summer Assignment Survival of the Sickest Big Idea 1: The process of evolution drives the diversity and unit of life. Passage 1: “Our genetic makeup has been adapting in response to where we live and what the weather’s like. The food we eat has evolved to cope with the organisms that eat it, and we’ve evolved to cope with that. We’ve looked at the way we’ve evolved to resist or manage the threat posed by specific infectious…

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    creative? We will find out if this bond between James Bronowski his notion of the nature of scientific reasoning and Luke Bawazer comparing to Edward Wilsons theory of intelligent evolution. Jacob Bronowski (2012) writes about Copernicus’s route to enlightenment as an obscure theorist challenging the common science of his time, his first stage was his mind to raise him from the planet, and put him enthusiastically, theoretically into the sun. This action signifies the start of…

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    Evolution is a change in populations over time. It is the population that evolves, rather than an individual. There are four mechanisms of evolution: mutation, gene flow, genetic drift, and natural selection. There were multiple contributors to the ideas of evolution, including Charles Darwin and Alfred Wallace. To begin with, mutations cause genetic variation. Genetic variations are the differences in DNA sequences. The differences in DNA sequences caused by mutations are known as…

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    a method for geneticists to study genetic variation and evolution. It is a model that predicts the outcome and offspring of a non-evolving population. This model is then compared to an existing population and the differences between the non-evolving population and the existing population display evolution.12 An example is polyploidy. In animals, polyploidy is extremely rare, however, in plants, polyploidy is common and it is the source of…

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