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Solar System

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Solar system

Solar system

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  • Transcript

    • 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.