Universe 3º cal, Lucía Ayllón

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Lucy prepared a beautiful presentation about the Universe and everything that goes with it. That is to say, a HUGE presentation. Nice one, Lucy!

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Universe 3º cal, Lucía Ayllón

  1. 1. TheEarthin theUniverse<br />
  2. 2. Sinceancient times, themovement of celestial bodies has attractedtheinterestof humanbeings.<br />?<br />
  3. 3. There are twotheoriesormodelstoexplainoursituation in theUniverse:<br /><ul><li>Thegeocentricmodel
  4. 4. Theheliocentricmodel</li></li></ul><li>Thegeocentricmodel<br />Ptolemy was a Greek astronomer who lived between 85- 165 A D. He was one of the first people who proposed a theory about the movement of heavenly bodies. This theory stated that the Earth was at the center of the Universe and all celestial bodies revolved around it.<br />
  5. 5. Theheliocentricmodel<br />Nicholas Copernicus was a Polish astronomer who lived between 1474-1543.Before his time, people believed in the Ptolemy model. He changed this belief when he introduced the heliocentric theory. He claimed that all planets including the Earth, moved around the sun.<br />
  6. 6. Galileo Galilei<br />Galileo Galilei was an Italian astronomer. He was born at the end of the sixteenth century. He was the first person to use a telescope to look at the sky. This invention was a major step forward in the knowledge of the cosmos. His defense of the heliocentric theory offended the Roman Catholic Church and this almost cost his life. He was sentenced by the Inquisition to house arrest for the rest of his life.<br />
  7. 7. Galaxies are hugeclusters of stars, interstellar gas and dust. Theymaycontainbillionsortrillions of starsand severalplanetarysystems.<br />Whatis a galaxy?<br />
  8. 8. Ourgalaxy: TheMilkyWay<br />Theuniversecontainsbillions of galaxies. TheMilkyWayisthegalaxyin whichourSolar Systemislocatedtogetherwithotherstars and planets.TheMilkyWay has a spiralshape and has severalarms.<br />Welive at thispoint, itiscalledOrionArm<br />
  9. 9. The Solar System<br /><ul><li>A mediumstar: TheSun</li></ul>The Solar Systemconsists of <br /><ul><li>A group of 8 planets, somedwarfplanets and 64 satellites.
  10. 10. A belt of asteroidsmostlybetweenMars and Jupiter
  11. 11. Comets</li></ul>Asteroids are rockyfragments of variable size.<br />Comets are bodies of rock, ice and dust<br />Satellites are bodiesthatrevolvearoundtheplanets.<br />
  12. 12. Planets in our Solar System<br />TheSun<br />Jupiter<br />Uranus<br />TheEarth<br />Mercury<br />Neptune<br />Mars<br />Saturn<br />Venus<br />
  13. 13. EarthMovements<br />Planetshavetwomovements: a traslationaroundthesun and rotationarounditsaxis.<br />TraslationRotation<br />
  14. 14. Dayornight<br />Therotationalmotion of theEarth causes whatwecall “night” and “day”<br />Earthrotatesfromwesttoeast<br />day<br />night<br />
  15. 15. Seasons<br />Seasons are a consequence of translationalmotion and thetilt of Earth´s axis<br />Invierno<br />Los rayos son más perpendiculares a la superficie terrestre<br />
  16. 16. TheMoon<br />Themoonistheonly natural satellite of ourplanet<br />

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