...The Milky Way Galaxy * A spiral type of Galaxy * composed of 200 billion stars. * One revolution every ~200 million years. * 100,000 lights years long * 3000 light years wide Our Solar System is mainly composed of: * STARS * PLANETS * SPACE DEBRIS STARS - are luminous heavenly bodies which have their own light. We can see near about 2500 stars on a clear night with our naked eye. But in actual, total no of stars are countless. The star which is nearest to earth is sun. It is the brightest star of all. The second nearest star except sun is Alpha-Centauri. THE SUN * Diameter: 1.4 million km * Age: 4.5 billion years (lifetime 11 billion years) * Mass: 2 x 1030 kg (330,000 x Earths) (99.8% of mass of solar system) * Density: 1.41 (water = 1) * Composition (by mass): Hydrogen: 73%, Helium: 25%, Others: 2% * Distance from Earth: 149.6 million km. * Distance to nearest Star: 9.46 million million km. * Luminosity: 4 x 1026 J s-1 (390 billion billion Megawatts). Solar Cycle: 8 - 11 years. * Temperature at Surface: 5,800°C (10,500 °F). * Temperature of Core: 14 million°C (22.5 million °F) POLARIS - known by many names, is one of the most famous stars in the sky. Polaris is also known as Alpha Ursae Minoris and is part of the constellation Ursa Minor, which is the Little Bear. Polaris is always in the sky; it does not disappear depending on the season, which is one reason why it has been...
Words: 1112 - Pages: 5
...The diameter of the Universe is approximately 91 billion light years. The smaller inner planets are composed of rocks while the bigger outer planets are composed of gases. The giant planets are toward the outside of the solar system because Newton’s second law of motion states that force equals mass multiplied by acceleration and since the giant planets have more mass, their force increases. Orbits get farther and farther apart as you go away from the sun because the sun gives off gravitational force and as a planet moves farther away, the acceleration increases, increasing the gravitational force. To begin, the giant gas planets are toward the outside of the solar system because they have more mass. The pocket solar system model states that the outer planets have more mass than inner planets, as they surround the inner planets (Pocket Solar System Model). Since the giant planets have more mass, their force increases, expanding their orbit range. The Big Bang Theory claims that a huge explosion created the universe, and since the biggest planets have the...
Words: 469 - Pages: 2
...The Solar System was formed around 4 billion years ago due to a cloud. It is a part of the Milky Way galaxy and consists of 8 planets. All the planets within the Solar System revolve around a star, known as our sun. The following planets listed are in order from closest to furthest from the sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Although, there is a dwarf planet named Pluto, which is unofficially the ninth planet in our Solar System. Each planet falls into a certain category, either Terrestrial Planets, or Giant Planets. The reason for the name of the Giant Planets, is because they are either of an ice giant or a gas giant. Mercury, Venus and Mars fall into the Terrestrial Planet category. Meanwhile, Jupiter, Saturn, Uranus, and Neptune fall into the Giant Planet category. The reason for...
Words: 413 - Pages: 2
...On september 23rd, 1846 two astronomers John Couch from Britain, And Urbain Le Verrier from France joined together and used calculations to find the exact location of of Neptune. They both claimed they found it and it lead to an national dispute. Neptune is the eighth planet the solar system. Uranus is in front and Pluto is behind it. The planet takes 15 hours, 57 minutes and 59 seconds to fully rotate. That is a little faster than Earth's rotation. Now before you see how many miles large it is I will tell you that it is three point nine times larger than earth. It is 5,299 miles. And its mass is 17 times larger than Earth's mass, Its gravity is 11.15 m/s. So if you weigh 100 pounds on earth you would weigh 110 pounds on Neptune. Its takes...
Words: 548 - Pages: 3
...Uranus is the seventh planet from the sun in the solar system. It has the third largest mass in the solar system. It was William Herschel who discovered Uranus in 1781. In two years William thought it was a star or a comet. But then Uranus was accepted as a planet because of Johann Elert Bode’s observations. William wanted the planet to be called Georgium Sidus because of the king George III. But the planet was called Uranus after the Greek god of sky. It takes Uranus 17 hours and 14 minutes to to rotate 1 time and it takes 84 earth years to spin around the sun 1 time. It has got 27 moons and they are divided into three different groups: thirteen inner moons, five major moons and nine irregular moons. The moons are named after characters...
Words: 747 - Pages: 3
...Our Solar System. It’s crazy to think that our Solar System was formed over five billion years ago. The formation of our Solar System is fascinating. In this essay i used the article ‘How our Solar System formed’ by Cynthia Brown and the video ‘How did the Earth and Solar System formed?’You will read about the creation of the Sun, our planets, and Earth The Sun. The Sun is the main part of our Solar System. The Sun is the reason we even have a planet to call “Earth.” This is why the Sun plays the most important role in our Solar System. The Sun was created by a cloud called nebula collapsed. After the collapse the atoms in the nebula started to gain heat. Soon enough the atoms had so much heat that they started to fuse together. Therefore, the Sun was created. I found this information in the article How Our Solar System Formed by Cynthia Brown. Another key point in why the sun plays an important role in our solar system is that the sun gives us light and heat and without that the human population wouldn’t be able to...
Words: 589 - Pages: 3
...Life on Earth and the possibilities of extraterrestrial life in our solar system 2. Explain the theories for the genesis of life. There are many cultures and religions explaining their version of the theories for the genesis of life. Back in Medieval times some Europeans believed that small creatures appeared without apparent external cause or reason from garbage or old clothes. An Italian physician named Francesco Redi proved this belief to be wrong. He proved that maggots came from flies that laid their eggs, rather than appearing without apparent external cause from garbage or old clothes. Genesis of life came from sunlight. An experiment was conducted by a student of Physics testing energy for rearranging atoms and molecules into organic forms. The student Stanley Miller filled a closed glass container with a mixture of gases. A reservoir of boiling water was at the bottom and above it was an apparatus that caused sparks to pass through the gas mixture. Amino acids and other organic chemicals formed from the gases and water. Since then, there has been other more sophisticated research has been conducted synthesizing additional amino acids and even nucleic acids. These molecules organize into DNA and RNA encoding the genetic information of organisms. The origin of Life - science.jrank.org/ 3. Explain the theory of natural selection. There was a time when scientist believed that species developed gradually from...
Words: 765 - Pages: 4
...Solar System Our understanding of the Solar System has changed over time. For over one thousand years the widespread belief was that the earth was stationary and at the center of the universe. Since that time, through a series of discoveries it has been proved that the earth not stationary and it is not at the center of the universe. The Ptolemaic system was developed early in the first century by Claudius Ptolemy who believed like most Greek Scholars in the geocentric view that the earth was stationary and at the center of the universe. Over one thousand years later, Nicolas Copernicus, a mathematician and astronomer believed in the heliocentric theory that it was not the earth, but the sun that was the center of the universe. His book, “On the Revolution of the Heavenly Spheres” laid the groundwork for future observations and discoveries and his work became known as the Copernican model. Galileo’s observations through the use of a telescope he built, was able to provide the evidence needed to support the heliocentric theory. In 1572 Tyler Brahe discovered a new star and after sixteen months it disappeared from site. This discovery conflicted with earlier views that the stars were fixed. (Space Discovery website, n.d.) Based on his observations and measurements of our solar system, Brahe proposed a model that fell in between the Ptolemaic and Copernican models. (The Obervations of Tycho Brahe, n.d.) His discoveries and writings were central to the advancement in...
Words: 1394 - Pages: 6
...Simulation of a Stirling Engine Solar Power Generation System Using Simulink Mehdi Zareian Jahromi∗ , Mohammad Mehdi Hosseini Bioki† , and Roohollah Fadaeinedjad‡ , Member IEEE ∗† Electrical ‡ Electrical and Computer Engineering Department, Kerman Graduate University of Technology, Kerman,Iran. and Computer Engineering Department, Kerman Graduate University of Technology, Kerman,Iran. Telephone: +98-3426226517, Fax: +98-3426226618, Email: rfadaein@ieee.org ‡ International Center for Science, High Technology and Environmental Sciences, Kerman, Iran. could be especially useful in developing countries since they will run on any fuel, including biomass; or when incorporated in parabolic dish systems, they can use solar energy. Cogeneration is possible using the cooling water that maintains the cold sink, so heat-and-power systems for homes are provided. With higher efficiencies, their quiet vibration-free operation, very low emissions when burning natural gas, simplicity, and potentially high reliability could make the Stirling engines an attractive alternative in the near future [6]. Simulation and modeling can be used to evaluate the operation of the solar Stirling engine based power generation systems. Considerable research has been performed on the modeling and control of Stirling engine systems. Most of this research, however, has been done using mechanical and thermal models of Stirling engines that neglects the electrical parts of the system [5], [7], [8]. In this research...
Words: 3882 - Pages: 16
...National Science Teachers Association Converting sunlight into other forms of energy: Using photovoltaic cells made from silicon alloys for solar power Author(s): Robert A. Lucking, Edwin P. Christmann and Robin Spruce Source: Science Scope, Vol. 34, No. 4, Elements, Compounds, and Mixtures (DECEMBER 2010), pp. 52-55 Published by: National Science Teachers Association Stable URL: http://www.jstor.org/stable/43182959 Accessed: 21-04-2016 08:54 UTC Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at http://about.jstor.org/terms JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org. National Science Teachers Association is collaborating with JSTOR to digitize, preserve and extend access to Science Scope This content downloaded from 103.4.92.54 on Thu, 21 Apr 2016 08:54:57 UTC All use subject to http://about.jstor.org/terms ^mSÜtrek Converting sunlight into other forms of energy: Using photovoltaic cells made from silicon alloys for solar power by Robert A. Lucking, Edwin P. Christmann, and Robin Spruce Photovoltaic cells may one day surround our ence curriculum springs from new concerns about how we power our homes...
Words: 2745 - Pages: 11
...SOLAR PANEL SYSTEMS: Importance of solar panels With the earth's natural resources dwindling quickly we were on the verge of running out of power. Electricity bills are rising day in and day out. In such a scenario, finding alternative sources of energy had become mandatory. Focus shifted to using renewable and inexhaustible sources to fulfill the energy needs. Solar energy emerged as a potential option. Other than saving the nation’s resources, solar energy has benefitted its users at the basic grass root level. It has now been touted as the major power source worldwide. 1. Save on electricity bills: By installing solar panels on your roof, you ensure that every sunray that hits the panels lowers...
Words: 1060 - Pages: 5
...What is the Solar System? The Solar System is a stellar system made up of the Sun and the planetary system that orbits it, either directly or indirectly. Of those objects that orbit the Sun directly, the largest eight are the planets, with the remainder being significantly smaller objects, such as dwarf planets and small Solar System bodies such as comets and asteroids. *The Planets of the Solar system and their name meanings Mercury- the messenger god Venus- god of love Earth- is the son of Gaia goddess of universe Mars- god of war Jupiter- god of lightning Saturn- god of agriculture Uranus- god of light Neptune- god of the sea Pluto- god of death Mercury is the smallest and closest to the Sun of the eight planets in the Solar System, with an orbital period of about 88 Earth days. Seen from Earth, it appears to move around its orbit in about 116 days, which is much faster than any other planet in the Solar System. It has no known natural satellites. The planet is named after the Roman deity Mercury, the messenger to the gods. Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. It has no natural satellite. It is named after the Roman goddess of love and beauty. After the Moon, it is the brightest natural object in the night sky, reaching an apparent magnitude of −4.6, bright enough to cast shadows. Because Venus is an inferior planet from Earth, it never appears to venture far from the Sun. Earth is the third planet from the Sun, the...
Words: 1042 - Pages: 5
...Evolution Through the Solar System Abstract Over the course the class has been about many different things through our solar system, land features, and more. This week we had to put together a paper describing how evolution has taken place through our solar system. The main objectives of the paper are to include the formation of the planets, the motion of the planets, the early revolution. Also, discussed is the scientists who discovered these properties of our solar system. For example Copernicus, Newton, Galileo, and Kepler. These scientists have all created or in some way helped to discover something new about our solar system. Evolution Through the Solar System Though scientists have been studying the solar systems for years. There are still discoveries made each year. Many of the discoveries have been interesting from the formation and motion of the planets, the early revolution of the planets, and the scientists who discovered what we know today. Formation Scientists have been studying the origin of our solar system for hundreds of years. Some findings are well supported while others are not as well received. The best news is we are not done concluding the formation of our solar system just yet. In 2006, the distant ice-covered body known as Pluto was reclassified as a dwarf and changed the model of our solar system from nine planets to eight. Today a planet is defined as, “A full-fledged planet is an object that orbits the sun and is large enough to have...
Words: 1963 - Pages: 8
...SOLOR SYSTEM ABSTRACT The Solar System is made up of all the planets that orbit our Sun. In addition to planets, the Solar System also consists of moons, comets, asteroids, minor planets, dust and gas. The inner solar system contains the Sun, Mercury, Venus, Earth and Mars. The main asteroid belt lies between the orbits of Mars and Jupiter. The planets of the outer solar system are Jupiter, Saturn, Uranus and Neptune (Pluto is now classified as a dwarf planet). Everything in the Solar System orbits or revolves around the Sun. The Sun contains around 98% of all the material in the Solar System. The larger an object is, the more gravity it has. Because the Sun is so large, its powerful gravity attracts all the other objects in the Solar System towards it. At the same time, these objects, which are moving very rapidly, try to fly away from the Sun, outward into the emptiness of outer space. The result of the planets trying to fly away, at the same time that the Sun is trying to pull them inward is that they become trapped half-way in between. Balanced between flying towards the Sun and escaping into space, they spend eternity orbiting around their parent star. Introduction: Humans live on a small planet in a tiny part of a vast universe. This part of the universe is called the solar system, and is dominated by a single brilliant star-the sun. The solar system is the earth’s neighborhood and the planets Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto are the Earth’s...
Words: 1578 - Pages: 7
...Space Space is a big place , some scientists believe that it is neverending. There are many things that make up space from tiny specs of dust, to huge gigantic galaxies and solar systems. Solar systems is what makes up most of space, there are so many structures to the solar system. These structures consist of planets, gasses, and energy. THe one thing that holds all of this matter is a star in the middle of the solar system. These stars have a very large gravitational pull that holds everything in place, planets also have a gravitational pull but it's not as powerful as the sun's gravitational pull, which makes it so that the planets do not float away but also do not come crashing into the sun. Stars are immense balls of gas that produce...
Words: 1095 - Pages: 5
