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Free research papers and essays on topics related to: comets

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  • Comets - 1,438 words
    Comets Before the seventeenth century, comets were considered portents-warning shots fired at a sinful Earth from the right hand of an avenging God. However, in the post-Newtonian era, when their paths were understood to intersect that of the Earth, they were considered actual agents of destruction. Experts have described comets as the carriers of both life-seeds to the early Earth and horrific missiles that will one day snuff out life as we know it. At one time or another, people have blamed comets for war and held responsible for the deaths of men, the birth of good wine, the London fire of 1666, severely cold weather, etc . . . If one central theme runs throughout history of comets, it mu ...
    Related: comets, seventeenth century, san francisco, central theme, michael
  • Comets - 1,209 words
    Comets The first written records of comets date back to nearly 3,000 years ago from China and Europe. The accounts of these comets were believed to be the causes of terrible events that occurred afterwards. In more recent times, however, astronomers have found out what they really are. A comet is basically a mixture of ices, from both water and frozen gases, and dust. They have also been given the names dirty snowballs or icy mud balls. The typical comet is less than 10 kilometers across. They spend most of their time frozen solid in the outer parts of our solar system. Comets are composed of five parts: the nucleus, coma, hydrogen cloud, dust tail, and ion tail. The nucleus is pretty solid ...
    Related: comets, solar wind, magnetic field, total number, decrease
  • Comets - 1,118 words
    ... is cloud remains a theory only, as it has never been directly detected. The Kuiper Belt is a region that was first proposed by the Dutch-American astronomer Gerard Kuiper in 1951. Seeing that Oort's cloud of comets did not really explain the reason for the population of comets with short orbital periods (making complete orbits around the sun in less than 200 years), Kuiper thought that a belt of comets probably existed outside the orbit of Neptune within the range of 30 to 50 astronomical units (2.8 to 4.6 billion miles) from the sun. Collisions and perturbations by the planets of our solar system are believed to be the reasons for the ejection of bodies from this belt. Around 1988, astr ...
    Related: comets, deep space, solar wind, solar system, angle
  • Adrienne Richs Revision - 1,333 words
    Adrienne Rich's Revision The author writes about her personal experience as a woman writer in a male dominated society. Her essay consists of poems, which she had written throughout different times in her life, to demonstrate the transformation in her writing. As a woman writer in a male dominated society, Rich begins writing in the traditional style, "the man's way," but as she continues writing, Rich breaks from these traditional styles to form her own. Like Freire, Rich believes people should break from society and be able to think and question things for themselves. While Freire wants to change the educational system, Rich wants to change writing. Both Freire and Rich want to break from ...
    Related: adrienne, adrienne rich, revision, real life, personal experience
  • Against Ufos - 809 words
    Against Ufos UFOs: Neither Here nor There Throughout the past, the existence of unidentified flying objects and aliens has been disputed over and over. Many different platforms and viewpoints have been taken in order to support the respective sides of the issue. The main argument against intelligent life existing somewhere other than Earth is that of where they derive. The truth of the matter is there is no place in the universe that UFOs and aliens could exist. Skeptics are faced with the fact that modern science has stated that no other orbital body in our solar system or immediate surrounding area is able to sustain life (Blum, 1990). Our solar system is a collection of planets, comets, a ...
    Related: ufos, solar system, great leap, modern science, astronomy
  • Astronomers - 1,780 words
    Astronomers Part One Brief Descriptions of the Following Astronomers: Walter Baade : Baade was a German-born American, whose work gave new estimates for the age and size of the universe. During the wartime, blackouts aided his observatons and allowed him to indentify and classify stars in a new and useful way, and led him to increase and improve Hubble's values for the size and age of the universe (to the great relief of geologists.) He also worked on supernovae and radiostars. Milton Humason : Humason was a colleague of Edwin Hubble's at Mt. Wilson and Palomar Mtn. who was instrumental in measuring faint galaxy spectra providing evidence for the expansion of the universe. Jan Oort : In 1927 ...
    Related: catholic church, isaac newton, solar system, holland, medieval
  • Astronomers Have Announced That A Large Asteroid On A Trajectory Heading Toward The Vicinity Of Earth Will, In Fact, Pass No - 479 words
    Astronomers have announced that a large asteroid on a trajectory heading toward the vicinity of Earth will, in fact, pass no closer to the planet than about 600,000 miles (about 966,000 kilometers). The announcement brought sighs of relief to the general public and scientific community, both of which had been in a frenzy since an earlier announcement suggested the space rock would pass much closer and possibly collide with the Earth. Such an impact would have catastrophic implications for the planet. Much evidence exists to indicate that ancient bombardment of the Earth by asteroids and comets may have precipitated mass extinctions of dinosaurs and other species. An announcement on March 11 ...
    Related: heading, trajectory, global cooling, general public, announcement
  • Beginning Of Earth - 650 words
    Beginning Of Earth There were volcanoes everywhere, there was lava pouring out from the earth in large quantities. Ash was flying around my very own head landing in my hair. It was one of the scariest things I have ever seen in my whole entire life. Then again I am only 16. Right when I tried to figure out what just happened I got sucked back into my room, like nothing had ever happened. I grabbed my journal and wrote down the following. The theory of evolution states that creatures change overtime to suit their surroundings. This is called environmental adaptation. The more a creature can adapt to its environment the greater chance it has of living and show an increase in population called ...
    Related: metamorphic rocks, last year, south africa, occurring, soup
  • Challenger - 2,357 words
    ... ere scrutinized. "Mr. OConnor - who flew on the shuttle Atlantis three months before Challenger was destroyed - said his next mission wasnt until 1991." (Price, p1) But there more to the effects than the investigations; there were also many emotional issues that had to be faced. "For the Challenger mission, Robert B. Sieck was Director of shuttle operations at Floridas Kennedy Space Center - a position he still holds. He is also 57, balding and soft spoken. On the wall of his second floor office is a formal portrait of the Challenger Crew, autographed by the seven members. ! There is also a quote from Teddy Roosevelt that he hung after the explosion. It says " the credit belongs to the m ...
    Related: challenger, shuttle challenger, space shuttle, modern physics, stars
  • Earth Planet - 2,166 words
    Earth Planet The Earth, man's home, is a planet. The Earth has special characteristics, and these are important to man. It is the only planet known to have the right temperature and the right atmosphere to support the kind of environments and natural resources in which plants and man and other animals can survive. This fact is so important to man that he has developed a special science called ecology, which deals with the dependence of all living things will continue to survive on the planet. Many millions of kinds of plants and animals have developed on Earth. They range in size from microscopic plant and animals to giant trees and mammoth whales. Distinct types of plants or animals may be ...
    Related: planet, northern hemisphere, mount everest, solar radiation, gravity
  • Extraterrestrials - 1,262 words
    Extraterrestrials Can the Earth be the only place in the Universe that harbors life? Most astronomers don't believe this is true. Certain statistics in the Universe provide evidence that living beings may be common place through out the universe, on planets of other stars besides the sun. In this paper I plan to discuss the various viewpoints of those that believe that extraterrestrials exist and have even been visiting Earth, and the viewpoints of skpetics that believe that aliens don't exist and have not been visiting Earth. To get into the topic we must first start at the base of the subject. First the question must be dealt with of life being only indigenous to planet Earth. One of the m ...
    Related: extraterrestrial life, human race, earth science, milky way galaxy, debate
  • From The Big Bang To Life On Earth - 1,239 words
    ... gets more complicated. Two-thirds of solar type stars (M class) in our Milky Way galaxy are members of binary or multiple star systems. When two stars are orbiting close together, their planets orbit both stars. When the stars are far apart, their planets only orbit one of them. Some problems with this situation include: Planets may not be able to form unless the stars are at least 50 AU away (1 AU = distance from the Earth to the sun) and stable orbits can only be achieved where companion stars are at less than 20 million miles apart or farther than one billion miles.3 A planet's orbit pattern is also of concern. Earth's orbit is very stable and only has a small degree of ellipticity. ...
    Related: bang, extraterrestrial life, west virginia, time zone, galactic
  • Is There Another Earth Out There - 1,049 words
    Is There Another Earth Out There? Is There Another Earth Out There? (adopted from an article by Guillermo Gonzalez, Donald Brownlee and Peter D. Ward, Refugees for Life in a Hostile Universe, Scientific American, October 2001) Is there life on other planets? Science has been trying to answer this question for a long time. In the article, the authors argue that it is highly improbable that complex life forms exist in our galaxy. To quote the authors: "Researchers are now casting a skeptical eye on musings about the prevalence of intelligent life throughout the Milky Way". Furthermore, according to the article, not only may most of the solar system be unfriendly to multi-cellular or complex or ...
    Related: ozone layer, building blocks, solar system, planet, casting
  • Life And Times Of Sir Isaac Newton - 1,955 words
    Life And Times Of Sir Isaac Newton Newton, Sir Isaac (1642-1727), mathematician and physicist, one of the foremost scientific intellects of all time. Born at Woolsthorpe, near Grantham in Lincolnshire, where he went to school, he began to attend Cambridge University in 1661; he was elected a Fellow of Trinity College in 1667, and a Lucasian mathematics professor in 1669. He stayed at the university, lecturing most of the years, until 1696. During these Cambridge years, in which Newton was at the top of his creative power, he singled out 1665-1666 as the prime of his age for invention. During two to three years of intense mental effort he prepared Philosophiae Naturalis Principia Mathematica ...
    Related: isaac, isaac newton, newton, sir isaac newton, ancient history
  • Life On Other Planets - 1,451 words
    Life On Other Planets Life On Other Planets Life exists on other planets. Out of the billions of solar systems, there has to be a chance that a least a couple planets have the ability to support life. Life may have developed on the planets like life developed here, but it may have developed differently also. Are they more intelligent than we are or are they single-celled organisms? Do they have broadcast capabilities, so they can contact us? It goes back to how life on Earth started. In the early days of Earth, the atmosphere was just carbon monoxide, but algae developed into plants which produced oxygen (Rather and Bowen 2). That brings us to the question of how the algae got here. The answ ...
    Related: planets, methods used, carbon dioxide, good idea, gravitational
  • Native American Astronomy - 1,177 words
    Native American Astronomy For many years astronomers and people alike have constantly heard about the observations and records of the Chinese and Europeans. No other culture can provide as much information as that gathered by the Chinese and Europeans, but there are many other cultures that observed and recorded the night sky, one of those being the Native Americans. During the last fifteen to twenty years archaeoastronomers have uncovered much concerning the beliefs and records of Native Americans. Unfortunately, the methods of keeping records of astronomical events were not as straight forward as the Chinese and Europeans. The Native Americans had to use what they could to record what they ...
    Related: american, american culture, astronomy, native, native american, native american culture, native americans
  • Origin Of Solar System - 1,786 words
    Origin Of Solar System The Origin of the Solar System One of the most intriguing questions in astronomy today is the how our solar system formed. Not only does the answer add insight to other similarly forming systems, but also helps to satisfy our curiosity about the origin of our species. Although it is highly unlikely that astronomers will ever know with absolute scientific certainty how our system originated, they can construct similar theoretical models with the hopes gaining a better understanding. A basic understand of the current physical aspects of our solar system are helpful when trying to analyzing its origin. Our solar system is made of the Sun, nine major planets, at least sixt ...
    Related: origin, solar, solar system, early stages, long history
  • Societies Realization Of Rock - 370 words
    Societies Realization Of Rock Societies realization of Rock by Karen The cultural establishment of the 50's was one of prosperity and rules. Authority figures were respected. There was a right and wrong. There were accepted ways of doing things and white people did what was expected of their class. Children and teenagers of the early '50's followed these rules obediently and unquestioningly. Then the middle '50's changed lives of Americans forever. They invented rock'n'roll. The establishment, which included parents, teachers and nearly ALL adults listened to Bill Haley and the? Comets send Rock Around the Clock though transistor radios everywhere in the country. He was different. But it was ...
    Related: punk rock, realization, rock, white people, sullivan show
  • Solar System Planets - 1,301 words
    Solar System Planets The earth is only one small planet in an extremely large system of planets, satellites, asteroids, meteors and comets that revolve around the sun. This system is referred to as the solar system. A planet is defined as a "celestial body that revolves around a central star and does not shine by its own light " (Grolier,1992). The only planetary system known to our civilization is our solar system. It is made up of nine planets that differ greatly size and physical characteristics. The nine major planets in our solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. There are also many other minor planets which are also in our solar system, ...
    Related: planets, solar, solar system, greenhouse effect, dust storms
  • The All American Girls Professional Baseball League - 1,763 words
    The All American Girls Professional Baseball League The All-American Girls Professional Baseball League Before we told our daughters that they could be anyone, or anything they wanted to be, we told them that they could only be what was acceptable for women to be, and that they could only do things that were considered "ladylike." It was at this time, when the nation was frenzied with the business of war, that the women of the All-American Girls Professional Baseball League decided that they could do and be whatever it was that they chose. These women broke free of the limitations that their family and society had set for them, and publicly broke into what had been an exclusively male sport ...
    Related: american, american economy, american people, american woman, baseball, baseball hall of fame, league
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