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Celestial bodies science اولى اعدادى marina gamil

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Celestial bodies science اولى اعدادى marina gamil

  1. 1. <ul><li>ce le s t i a l b o d i e s </li></ul><ul><li>Name : M a r i n a g a m i l </li></ul><ul><li>Under the supervision of : </li></ul><ul><li>Mr. W a e l N a g e b </li></ul><ul><li>Class : 1-b </li></ul><ul><li>School : Ahmed Zweal language school nasr city </li></ul>
  2. 2. the celestial bodies stars
  3. 3. planets
  4. 4. moons
  5. 5. <ul><li>Is the distance covered by the light in the year =9.467x 10 (12 ) </li></ul>light year
  6. 6. <ul><li>are the biggest units that’s the universe is consisted of </li></ul>galaxies
  7. 7. <ul><li>The galaxy that our solar system belongs to is known as ( the milky way ) or the way of chopped hay ) </li></ul>galaxy
  8. 8. <ul><li>Solar system consists of one star which is the sun and 8 planets </li></ul><ul><li>Solar system exists in the milky way </li></ul><ul><li>In addition to some smaller sized other components </li></ul>the solar system
  9. 9. <ul><li>Are spherical opaque bodies revolve around the sun in elliptical path </li></ul>planets
  10. 10. <ul><li>Are small planets that are effected by the gravity of the larger planets and rotate around them </li></ul>moon
  11. 11. what’s the number of moons rotating around planets ?
  12. 12. mercury any moon rotate arounnd it
  13. 13. venus any moons rotate around it
  14. 14. earth one moon rotates around it
  15. 15. mars two moons rotate around it
  16. 16. jupiter 62 moons rotate arount it
  17. 17. saturn 60 moon rotate around it
  18. 18. uranus 27 moons rotate around it
  19. 19. neptune 12 moons rotate around it
  20. 20. <ul><ul><ul><li>Are thousands of different sized rocky masses . </li></ul></ul></ul>astroids
  21. 21. <ul><li>Most of them rotate between the two orbits of mars and Jupiter in a certain region known as the wonder asteroid belt </li></ul>asteroids
  22. 22. <ul><li>Are small rocky masses THAT FALL WITHIN THE ATMOSPHERE AND BURN DUE TO HEAT PRODUCED FROM THE FRICTION WITH AIR </li></ul>meteors
  23. 23. <ul><li>ARE HUGE SOLID ROKY MASSES THAT FALL AND DID NOT BURN COMBLETLY PENETRATE THE ATMOSPHERE SOME PARTS OF THEM REACH TO THE EARTH ’ s SURFACE </li></ul>METEORITES
  24. 24. <ul><li>Are masses composed of rocks , ice and solidified gases . They rotate around the sun in more elongated elliptical orbits intersecting with the orbits of planets </li></ul>comets
  25. 25. <ul><li>A comets is consisted of a head contains ice spheres which is mixture of solidified gasses {carbon dioxide , nitrogen and methane gases } and rocky parts , dust and water molecules . </li></ul><ul><li>The second part of comets is Halley which was seen and studied in 1986 . </li></ul><ul><li>It completes one rotation around the sun every 76 years </li></ul>comets
  26. 26. <ul><li>The planets of solar system are divided into 2 groups according to their distance from the sun : </li></ul>
  27. 27. inner planets group
  28. 28. the outer planets
  29. 29. <ul><li>it is the nearest to the sun and includes : </li></ul><ul><li>Mercury , Venus , earth and mars </li></ul><ul><li>They are small solid bodies </li></ul><ul><li>Their densities are high ranging between3.3 to 5.5 g / cm{3} </li></ul><ul><li>They have a solid surface and all of them have an atmosphere except mercury </li></ul>the inner planets group :
  30. 30. <ul><li>They are the farthest planets from the sun including : </li></ul><ul><li>Jupiter , Saturn , Uranus and Neptune </li></ul><ul><li>They are giant planets because they are big sized </li></ul><ul><li>They have low densities ranging from 0.7 to 1.3 gm / cm{3} because they are consisted of gaseous elements where the most important of them are hydrogen and helium </li></ul>the outer planets group
  31. 31. the difference of gravity force on the surface
  32. 33. <ul><li>Isaac Newton was the first one who discovered the earth ’ s gravity force when he was standing under a tree and found an apple falling down to the ground </li></ul><ul><li>Then he proved that there is a force of gravity {attraction force } among objects in the space depends on </li></ul><ul><li>1- the mass of each object </li></ul><ul><li>2- the distance between them </li></ul>
  33. 34. so the planets revolve around the sun in the fixed orbits by the action of the sun’s gravitional force on them
  34. 35. arrange the planets descending regarding the acceleration due to the gravity mentioned in following table :
  35. 36. jupiter 22.88
  36. 37. neptune 11.00
  37. 38. earth 9.78
  38. 39. saturn 9.05
  39. 40. venus 8.60
  40. 41. uranus 7.77
  41. 42. mercury 3.78
  42. 43. mars 3.72
  43. 44. <ul><li>They are used for identifying the celestial bodies </li></ul>Telescopes
  44. 45. refracting telescope
  45. 46. reflecting telescope
  46. 47. <ul><li>Good -bye </li></ul><ul><li>Thanks </li></ul><ul><li>The work of the two students : </li></ul><ul><li>M a r i n a G a m i l </li></ul>

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