The Solar System Essays - Planetary Science, Solar System, Planet

The Solar System Assignment 1: The Solar System The solar system consists of the Sun; the nine planets, 67 satellites of the planets and a large number of small bodies (comets and asteroids). The inner solar system contains the Sun, Mercury, Venus, Earth and Mars: The planets of the outer solar system are Jupiter, Saturn, Uranus, Neptune and Pluto: The orbits of the planets are ellipses with the Sun at one focus, though all except Mercury and Pluto are very nearly circular. The orbits of the planets are all more or less in the same plane (called the ecliptic and defined by the plane of the Earth's orbit). The ecliptic is inclined only 7 degrees from the plane of the Sun's equator. Pluto's orbit deviates the most from the plane of the ecliptic with an inclination of 17 degrees. Below you see a diagram that show some relative information about most of the objects in our Solar System: Diameter (km) Moons Surface temp. Surface gravity Axial inclination Axial rotation The Sun 1 390 000 - 5800c - - 25 - 36 days Mercury 4 878 None 350c / -170c 0.38 0 58 days Venus 12 104 None 480c 0.9 178 243 days The Earth 12 756 1 20c 1 23.4 23h 56m Mars 6 787 None -23c 0.38 24 24h 37m Jupiter N/A 16 -150c 2.64 3.1 9h 50m Saturn 199 300 18 -180c 1.2 26.7 10h 39m Uranus 51 800 15 -210c 1.2 98 17h 10m Neptune 49 500 8 -220c 1.2 29.5 18h 24m Pluto 2 320 1 N/A 0.04 50 178 years The Moon 3 474 - 107c / -153c 0.17 1.5 27 days The Sun The sun is the most important part of our solar system. It is the biggest object and does have about 98% of the whole mass of the solar system. About 1,3 billion earths would fit inside the sun. The sun travels around the galaxy together with planets and other objects bound to it by gravitational forces. The largest of the bodies we call planets, most of which are in turn are orbited by smaller moons or satellites. These objects, together with many lesser masses, are known as the Solar system. The Sun is just a star, one of a hundred billion inhabiting our galaxy alone. Being a star the Sun is an example of the fundamental building blocks of our universe. It formed, 4.5 billion years ago, as the nucleus of a cloud of gas which was collapsing under its own gravitational attraction. At formation, hydrogen was the most abundant gas, as elsewhere in the universe, and accounted for three quarters of the Sun's original material. This will changes as the hydrogen is burned, and within the very central regions virtually all the hydrogen has been converted to helium. The outer regions have not yet taken part in hydrogen burning. Astronomers have measured the chemical composition of the Sun, and can thus estimate that of the initial solar nebula from which the sun and planets formed. In addition to 78 percent by weight of hydrogen, they find 20 percent to be helium, while only 2 percent remains for other elements such as oxygen, carbon, nitrogen, and iron. Later, as its hydrogen becomes depleted, it will evolve into a giant red star, swelling to engulf the earth and the inner planets. The remnant Sun will fade gradually to oblivion, passing through the white dwarf stage on its way. Mercury Mercury is named after the messenger of the Roman gods. It is the smallest of the inner planets and the second smallest in the whole Solar System. It has a very weak magnetic field and - being the closest planet to the Sun - has only a very thin atmosphere of helium captured from the solar wind. The surface of Mercury is very much like the Moon's - with craters, mountains and valleys. Since there is no form of atmosphere, life on Mercury is impossible. Nor will there be any manned flights in the forseeable future. However, there will be new unmanned probes sent out, if only to complete the map of the surface. Although Mercury has only a third the diameter of Earth, its density is about the same. This suggests that 65 to 70 percent of Mercury's weight is made up of

Open Doors With An Online IT Degree Essays

Open Doors With An Online IT Degree Essays Open Doors With An Online IT Degree Essay Open Doors With An Online IT Degree Essay There is no denying that finding a job in today’s economy can be difficult. With more workers laid off from positions every day, the competition out there can be incredibly stiff. If you’re among those who have discovered your current field just won’t cut it any longer, pursuing a different track has never been easier. Even if you are lucky enough to hang on to your present job, you can still obtain an online IT degree to prepare for what the future may bring. An online IT degree or other similar pursuit can open doors for you that you may have long thought closed. The reality is earning a degree online is more convenient, more affordable and even easier than you may have thought. While you will still have to earn the grade, an online business degree, computer sciences degree and so on can deliver these benefits to you as the economy spurts and sputters: Flexible class hours – While the actual structure of online degree programs can vary, in most cases you will have the freedom to work around a present job or family needs. You can work on your future at your own convenience while making sure things are taken care of in the present. Diversified options – An online IT degree might not appeal to you, but there are plenty of other options out there. Thanks to more colleges and universities taking their programs online, you can pursue an online MBA, nonprofit management credentials, a Masters in Education and more. The options are diversified and they are ones that involve fields that are more than holding their own. Earning a sense of pride – For workers who have been laid off or suspect it’s coming, doing something positive to change the future can be a tremendous sense of pride. When you work to obtain an online business degree, for example, you will know you are doing what you can to get back on your feet. An online IT degree and other similar programs can help anyone gain the independence and security they need in today’s economy. Adding to existing skills or completely retraining has never been easier.

Community Organizing Assignment Example | Topics and Well Written Essays - 250 words

Community Organizing - Assignment Example Next, with the help of local leaders, the organizer mobilizes the public and creates awareness on the issue at hand. Once society members are full participants, social planning and social action follow (McKenzie, Neiger & Thackeray, 2012). This involves coming up with the means to carry out a project and the actual process of implementing the project. Evaluation follows to study the success of the action and make adjustments if necessary. In this step, accomplishments get acknowledgement and lessons on how to improve future mobilizations noted. The community organizations get formalization after engaging in social action. Once this happens, the last step occurs. It involves the organizer leaving and the people taking over entirely. Community organization is an empowering process and, therefore, an organizer needs to leave once to let the empowered people carry on from there. In building community support for a health intervention, the social action step is the most crucial. This is because it involves the actual implementation of the project meant to improve health systems in a society. Social action is an act of power that proves indeed social organization and empowerment