Astronomy Essay Example | Topics and Well Written Essays - 500 words - 8

Astronomy - Essay Example Astronomical units are used for any measurement which has a certain reasonable length that humans can attain or reach. Light-years are usually reserved for objects too far away to ever be reached by one human’s lifetime. Stellar magnitude is the size and direction of a star. This is basically the star’s displacement. The difference between absolute and apparent magnitudes is that absolute magnitudes are fixed, real-time figures of information—whereas apparent magnitudes are just estimates based on what the human eye can see. That is the difference between the two phrases. Hipparchus originally drew his magnitude scale using very rudimentary calculations and tools. Today’s astronomers have modified it slightly by using more advanced techniques and a much more modern approach to the magnitude scale. Now, physics students all over use the magnitude scale developed by today’s most advanced and talented scientists. A. Compare the Ptolemaic and Copernican models of the universe. State the main tenet of each theory; how they are alike or different, what evidence each used to support the ideas, and how each explained the retrograde motion of the inner planets. (150 words)†¨ The Ptolemaic model of the universe stated that the universe revolved around the earth. Copernican theory stated that the model of the universe which was correct basically involved the universe revolving around the sun. They are both alike in the fact that both models involved the universe revolving around something—it was just that Ptolemy got it wrong. The evidence that Ptolemy used to support his claim was basically, he didn’t have evidence. It was by royal decree that the ruler in power wanted the earth to be the center of the universe. The evidence Copernicus used to show that the earth revolved around the sun was the entity of the eclipse—showing that the

Investment risk mangement Essay Example | Topics and Well Written Essays - 1250 words

Investment risk mangement - Essay Example Poor mortgage related investment was a very major reason which caused this failure as the real estate portfolio of the company was in a very awful shape. The liabilities of the firm were more than the assets. The firms major sources of revenue was coming from government, corporate industry along with other giant clients to whom financial advice was given related to financial transactions along with acting as a underwriter to the clients. The leverage policy of the organization was a major reason why the bankruptcy took place which basically includes terrible regulations of the firm. Market satisfaction was another important factor was it made the firm too much confident about their financial policies along with lack of financial operation’s transparency. The mortgages were not priced correctly before lending them out .The credit default swap market also had a huge impact on the failure along with misrepresentation in the financial statements also acting as a key cause in the bankruptcy. High level of asset to equity ratio along with extreme high level short term debt financing basically caused major problems for the company. The company was so many dependants on the short term debt that it had to face the risk of runs. Systemic risk was faced by Lehman brothers. There were many recommendations given as to how the risk should have been controlled by many financial experts however for such risks which caused this financial catastrophe. The search for buyer should have been started way before it actually was, bailing out Lehman Brother could have been another beneficial step. Proper steps should have been taken to avoid capital inadequacy. The arrival of the crisis was expected however the auditors and management did not take proper steps to avoid it on time. It is important for the organizations to use new and better methods for checking company’s financial conditions