How to explore the sky

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First session of astronomy and philosophy course in Lycée Polyvalent Chaplin Becquerel

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How to explore the sky

  1. 1. How to explore the sky.<br />
  2. 2. The daytime skyThe SunBe careful, we can not look directly at the sun, we should always protect ourselves with<br />a matched filter. <br />How to explore the sky.<br />
  3. 3. How to explore the sky.<br /> The daytime skyThe Sun<br />- The observation of his shadow help to determine its position in the sky.<br />Photo: P Jeanjacquot<br />
  4. 4. How to explore the sky.<br /> The daytime skyThe Sun<br />Photos: P Jeanjacquot<br />
  5. 5. How to explore the sky.<br />The daytime skyThe Sun<br />-The observation by projection allows us to observe and study sunspots.To measure their relative motion and to deduce the speed of rotation of the Sun<br />Image fromSolarscope<br />
  6. 6. How to explore the sky.<br />The daytime skyThe Sun<br />- The observation with selective filters allows us to see the Sun's surface at different altitudes to visualize the flares and the cells on the surface of the Sun.<br />Photo: P Jeanjacquot for Astro-philo<br />
  7. 7. How to explore the sky.<br />The daytime skyThe Sun<br />The observation is also space, a large number of satellites monitoring the Sun.<br />
  8. 8. How to explore the sky.<br />Le ciel diurne<br />Le Soleil<br />
  9. 9. A la découverte du Ciel!<br /> The daytime sky: <br />Example with satellites:<br /> SOHO website<br />
  10. 10. A la découverte du Ciel!<br /> The daytime sky: <br />Example with satellites:<br /> SDO website<br />
  11. 11. How to explore the sky.<br />The daytime sky: <br />The Moon<br />This picturewastookjustbefore the sunset. Photo P Jeanjacquot<br />
  12. 12. How to explore the sky.<br />The daytime sky: <br />The blue sky<br />This color is due to Rayleigh scattering. The molecules that make up the upper atmosphere scatter blue light.<br />
  13. 13. How to explore the sky.<br />The daytime sky: <br />The bluesky<br />Wecanseethiseffectwhen a white light cross a glass of dilutedmilk. The milkscatterblue light and the beamis orange whenitget out of the milk ( like the sunset light)<br />
  14. 14. How to explore the sky.<br />The night sky<br />The Stars<br />Albirédo : étoile double<br />Photos: P Jeanjacquot- option astro-philo<br />The colors of the stars (spectra) tell us about their nature (temperature, composition)<br />Stars, Cassiopee, Perseus<br />Photos: P Jeanjacquot- option astro-philo<br />
  15. 15. How to explore the sky.<br />The night sky<br />The moon<br />Observation may be on the surface of the Moon (craters and geological) or phases of the moon.<br />Photos: P Jeanjacquot<br />
  16. 16. How to explore the sky.<br />The night sky<br />How to find the planets.<br />Astronomical Clock in the Forbidden City in Beijing. We can see the planets on a plane around the Sun (photo P Jeanjacquot)<br />The planets are on a plane called the ecliptic. <br />
  17. 17. How to explore the sky.<br />The night sky<br />How to find the planets<br />The planets are on a plane called the ecliptic. They are easily spotted in the sky because they are rather on the south side on a curve (projection of the ecliptic plane).<br />
  18. 18. How to explore the sky.<br />The night sky<br />The planets<br />It is easy to produce images of planets with a telescope and a webcam<br />Photos: P Jeanjacquot- option astro-philo<br />
  19. 19. How to explore the sky.<br />The night sky<br />The MilkyWay<br />Mauna Kea Milky Way Panorama Credit & Copyright: Wally Pacholka (TWAN) <br />Milky way from the Great North, Photo P Jeanjacquot.<br />
  20. 20. How to explore the sky.<br />The night sky<br />Other galaxies<br />M31 With the schooltelescope (C8, with HEQ5 mount and canon 450D camera<br />M31 AndromedeGalaxy (in the redoval) as wecanseewithnakedeyesnearCassiopeia constellation (in the yellowoval)<br />Photos : P Jeanjacquot- option astro-philo<br />
  21. 21. How to explore the sky.<br />The night sky<br />Other galaxies<br />3. With the HawaiFaulkestelescope<br />2. With the schooltelescope (C8, with HEQ5 mount and canon 450D camera<br />1. From Hubble SpaceTelescope<br />Photos 2-3: P Jeanjacquot- option astro-philo<br />M51 The Whirlpool Galaxy<br />
  22. 22. A la découverte du Ciel!<br />The night sky<br />Birth and death of the stars<br />M57 the Ring Nebula is the remnant of a star that exploded at the end of life.<br />M42 the nebula of Orion is a stellar nursery<br />Photos: P Jeanjacquot option astro-philo<br />
  23. 23. How to explore the sky.<br />The night sky<br />Star clusters<br />The double cluster in Perseus is an open cluster.<br />M 13 Hercules Globular Cluster<br />Photos: P Jeanjacquot- option astro-philo<br />
  24. 24. How to explore the sky.<br />The night sky<br />The comets<br />Holmes comet<br />Photos: P Jeanjacquot- option astro-philo<br />
  25. 25. How to explore the sky.<br />Night sky<br />The meteorits<br />APOD: Meteors Between Stars and Clouds Credit & Copyright: Pierre Martin & Michael F. Vasseur<br />
  26. 26. How to explore the sky.<br />Night sky<br />The artificial satellites<br />Photo: P Jeanjacquot<br />
  27. 27. How to explore the sky.<br />Night sky<br />The Earthrotates!<br />Star Trails P Jeanjacquot<br />Trail of 50 pictures with StarMax software<br />
  28. 28. How to explore the sky.<br />How to find objects in the sky?<br />The astrolabe<br />Photos: P Jeanjacquot- option astro-philo<br />
  29. 29. How to explore the sky.<br />Comment trouver les objets dans le ciel?<br />The star finder<br />Copyright: SRAC<br />
  30. 30. How to explore the sky.<br />How to find objects in the sky?<br />The sofwares: we use Stellarium (freeware)<br />
  31. 31. How to explore the sky.<br />How to find objects in the sky?<br />Wecan use the maps in the astronomy magazines<br />
  32. 32. How to explore the sky.<br />How to find objects in the sky?<br />Use the celestialcoordinates system: <br />Altitude and Azimuth<br />
  33. 33. How to explore the sky.<br />How to find objects in the sky?<br />Use the celestialcoordinates system: <br />Right ascension and declination<br />
  34. 34. How to explore the sky.<br />How to observe<br />Wecan observe withnakedeyesourwithdifferentequipments.<br />Images for SkyWatcher, Meade, Celestron<br />
  35. 35. How to explore the sky.<br />How to observe?<br />Wecan use data bases.<br />http://cdsweb.u-strasbg.fr/<br />http://www.us-vo.org/http://archive.eso.org/eso/eso_archive_main.html<br />
  36. 36. How to explore the sky.<br />How to observe?<br />Remotetelescopes<br />http://faulkes-telescope.com/<br />
  37. 37. How to explore the sky.<br />How to observe?<br />Image processing<br />M57<br />Processingwith freewares(Iris, imageJ, registax…)<br />Cat eyenebula NGC6543<br />Photos: P Jeanjacquot- option astro-philo with the Faulkestelescopes<br />
  38. 38. How to explore the sky.<br />The skycanalsobe observe with not visible lights<br />

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