28.1 Presentation (CP)

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28.1 Presentation (CP)

  1. 1. The Sun-Earth-Moon System Chapter 28
  2. 2. Think-Pair-Share • What do astronomers do? • How does astronomy relate to your daily life? • What do you observe in the sky?
  3. 3. Tools of Astronomy SECTION 28.1
  4. 4. Radiation
  5. 5. Radiation • light common term for electromagnetic radiation
  6. 6. Radiation • light common term for electromagnetic radiation • caused by wavelengths and frequencies
  7. 7. Radiation • light common term for electromagnetic radiation • caused by wavelengths and frequencies • wavelength - distance b/w peaks on a wave
  8. 8. Radiation • light common term for electromagnetic radiation • caused by wavelengths and frequencies • wavelength - distance b/w peaks on a wave • frequency - # of waves/oscillations per second
  9. 9. Mathematical Relationship c = λf • c = speed of light (3.0 x 108 m/s) • λ = wavelength (m) • f = frequency (Hz)
  10. 10. Examples
  11. 11. Examples • f = 108 Hz λ=?
  12. 12. Examples • f = 108 Hz λ=? • If light has a wavelength is 10-10 m, what is the frequency of its wave.
  13. 13. Telescopes
  14. 14. Telescopes • BENEFITS:
  15. 15. Telescopes • BENEFITS: • ability to attach different detectors to observe all wavelengths
  16. 16. Telescopes • BENEFITS: • ability to attach different detectors to observe all wavelengths • brings much more light to focus than human eye
  17. 17. Telescopes • BENEFITS: • ability to attach different detectors to observe all wavelengths • brings much more light to focus than human eye • allows astronomers to use specialized equipment
  18. 18. Telescopes • BENEFITS: • ability to attach different detectors to observe all wavelengths • brings much more light to focus than human eye • allows astronomers to use specialized equipment • can be used to make time exposures w/ aid of cameras or other imaging devices
  19. 19. Types of Telescopes
  20. 20. Types of Telescopes • 2 types used to focus visible light:
  21. 21. Types of Telescopes • 2 types used to focus visible light: • refracting
  22. 22. Types of Telescopes • 2 types used to focus visible light: • refracting • reflecting
  23. 23. Types of Telescopes • 2 types used to focus visible light: • refracting • reflecting • majority used
  24. 24. Types of Telescopes • 2 types used to focus visible light: • refracting • reflecting • majority used • most located @ observatories @ high elevations
  25. 25. Refracting Telescope • refracting telescope - uses lenses to bring visible light to a focus
  26. 26. Reflecting Telescope • reflecting telescope - uses mirrors to bring visible light to a focus
  27. 27. Telescopes cont...
  28. 28. Telescopes cont... • interferometry - process of linking separate telescopes together so they act as one telescope
  29. 29. Telescopes cont... • interferometry - process of linking separate telescopes together so they act as one telescope • detailed image improves as distance b/w telescope increases
  30. 30. Satellites
  31. 31. Satellites • sent into space to collect information
  32. 32. Satellites • sent into space to collect information • b/c earth’s atmosphere blocks infrared and ultraviolet radiation, x-rays, and gamma rays
  33. 33. Satellites • sent into space to collect information • b/c earth’s atmosphere blocks infrared and ultraviolet radiation, x-rays, and gamma rays • to obtain close up observations
  34. 34. Satellites • sent into space to collect information • b/c earth’s atmosphere blocks infrared and ultraviolet radiation, x-rays, and gamma rays • to obtain close up observations • obtain samples from nearby objects
  35. 35. Satellite
  36. 36. Hubble Space Telescope
  37. 37. Hubble Space Telescope • one of best-known space observatories
  38. 38. Hubble Space Telescope • one of best-known space observatories • designed to obtain sharp, visible images w/ out atmospheric interference and make observations in infrared and ultraviolet wavelengths
  39. 39. Hubble Telescope
  40. 40. Spacecraft
  41. 41. Spacecraft • robotic probes make close-up observations and sometimes land to collect information
  42. 42. Spacecraft • robotic probes make close-up observations and sometimes land to collect information • practical only for objects in our solar system
  43. 43. Human Space-Flight
  44. 44. Human Space-Flight • space shuttle program provides environment for scientists to study effects of space
  45. 45. Human Space-Flight • space shuttle program provides environment for scientists to study effects of space • long-term effects studied in space stations
  46. 46. Human Space-Flight • space shuttle program provides environment for scientists to study effects of space • long-term effects studied in space stations • International Space Station
  47. 47. I.S.S.
  48. 48. Spinoffs
  49. 49. Spinoffs • spinoffs - NASA technology that has been passed to commercial industries for common use
  50. 50. Spinoffs • spinoffs - NASA technology that has been passed to commercial industries for common use • cordless tools
  51. 51. Spinoffs • spinoffs - NASA technology that has been passed to commercial industries for common use • cordless tools • pumps in artificial hearts

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