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# 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
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