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Solar system

Solar system

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  • 1.  
  • 2.  
  • 3. Earth
  • 4. Atmosphere … Gives us the air we breathe
  • 5. Protects us from meteorites and harmful cosmic radiation
  • 6. Blanket covering the Earth from heat at day and cold at night
  • 7.  
  • 8. Bye-bye, Earth!
  • 9. Hi Mercury!
  • 10. Mariner 10: images of Mercury
  • 11. 4.6 billion years ago: Heavy Bombardment
  • 12. Barringer crater, Arizona 49,000 yr old Iron meteorite of size 50 m, mass 300,000 ton Impact velocity 11 km/sec Our Earth is a target, too!
  • 13. 150 known impact sites on Earth Diameters from 50-70 m to 200 km
  • 14. 65 million years ago a huge meteorite of 10 km size hit the Earth
  • 15.  
  • 16.
    • World-wide fires
    • 1-km-hign tsunamis
    • Acid rains and atmospheric pollution
    • Darkness and severe winter for many decades
    ¾ of all living species have been killed
  • 17.  
  • 18. Our Moon could have been formed in a giant collision 4.5 billion years ago
  • 19.  
  • 20. The Peekskill meteorite October 9, 1992 12 kg stony meteorite hit the Earth
  • 21. Venus the Beautiful
  • 22. Venus - the brightest "star" The goddess of beauty
  • 23.  
  • 24. Venus and Earth - sister planets?
  • 25.  
  • 26. Flight over Venus
  • 27. Fig. 17-3a, p.349 Greenhouse for trapping heat Runaway greenhouse effect
  • 28. Atmosphere lets the visible sunlight in, but traps infrared radiation and prevents rapid cooling of the surface at nights
  • 29.  
  • 30.  
  • 31. "It will be possible to see cities on Mars, to detect navies in [its] harbors, and the smoke of great manufacturing cities and towns... Is Mars inhabited? There can be little doubt of it ... conditions are all favorable for life, and life, too, of a high order. Is it possible to know this of a certainty? Certainly." Samuel Leland 1895 Seasons on Mars? Channels for irrigation ???
  • 32. Sorry, no channels – just dry canyons, lava flows and dusty deserts …
  • 33.  
  • 34. Dry riverbeds, traces of flooding
  • 35. No water, just dry desert …
  • 36. Salty rocks on Mars: former sea bottom
  • 37.  
  • 38. Journey to outer planets 8 billion miles through space!
  • 39. Giant planets
  • 40. Jupiter – the biggest planet
  • 41. The Red Spot
  • 42.  
  • 43. Io Europa Ganymede Callisto Total 61 moons discovered so far Most are captured small asteroids Galilean moons:
  • 44.  
  • 45. Europa – a giant skating rink
  • 46.  
  • 47. Io – giant volcanoes
  • 48.  
  • 49.  
  • 50. Saturn – second largest planet So fluffy – it could float in water
  • 51. Enormous winds: 1800 km/hr !! The Great White Spot: huge storm
  • 52. Thickness: less than 1 km Extend from 74,000 to 137,000 km Discovered by Huygens in 1659 Saturn rings
  • 53.  
  • 54. Flying through the rings
  • 55. Titan, the mysterious moon of Saturn
  • 56.  
  • 57. Uranus
  • 58. What happened to Miranda?
  • 59. Neptune
  • 60. Triton
  • 61.  
  • 62. Pluto and Charon
  • 63.  
  • 64.  
  • 65. The Kuiper Belt – home for short-period comets?? Starting in 1992, astronomers have become aware of a vast population of small bodies orbiting the sun beyond Neptune. There are at least 70,000 "trans-Neptunians" with diameters larger than 100 km in the radial zone extending outwards from the orbit of Neptune (at 30 AU) to 50 AU.
  • 66.  
  • 67.  
  • 68.  
  • 69.