1. Our Star The Sun C. Alex Young NASA Goddard Space Flight Center July 21, 2006 NASA GSFC Visitor’s Center

2. What is the Sun? The Sun’s place in the universe The Sun’s place in the solar system The Sun’s structure The dynamic Sun Eclipses on Earth

3. What is the Sun? The Sun’s place in the universe The Sun’s place in the solar system The Sun’s structure The dynamic Sun Eclipses on Earth

4. Our Star the Sun The Sun is a star. Ball of rotating hot gas with a nuclear fusion core. It is our energy source - it drives the Earth

6. Through a camera

9. Why study the Sun?

10. What is the Sun? The Sun’s place in the universe The Sun’s place in the solar system The Sun’s structure The dynamic Sun Eclipses on Earth

11. The Milky Way

12. Types of stars

13. What is the Sun? The Sun’s place in the universe The Sun’s place in the solar system The Sun’s structure The dynamic Sun Eclipses on Earth

14. The Solar System

15. Earth sized planets

16. Gas giants

17. The Sun

18. Solar facts diameter - 109 Earths (1.4 million km) circumference - 342 Earths volume - 1,300,000 Earths distance from Earth - 150 million km surface temperature - 5800 C

19. What is the Sun? The Sun’s place in the universe The Sun’s place in the solar system The Sun’s structure The dynamic Sun Eclipses on Earth

20. Parts of the Sun

21. From the inside out

23. Sound waves in the Sun

24. Surface oscillations

25. Interior imaging

26. Sunspot layers

27. Parts of the Sun

28. Sunspots

29. Filaments

30. Prominences

31. The Corona

32. The Solar wind and the heliosphere

33. What is the Sun? The Sun’s place in the universe The Sun’s place in the solar system The Sun’s structure The dynamic Sun Eclipses on Earth

34. Magnetic field

35. Plasmas

36. Examples of plasmas

37. Differential rotation

38. Text Magnetic loops

39. The magnetic carpet

40. Dynamic Sun

41. Flares and CMEs

42. The solar cycle

43. High energy flare

44. Space Weather Terrestrial Power Systems Spacecraft charging Astronauts can experience radiation exposure in high inclination orbits and outside the Earth’s magnetosphere

45. What is the Sun? The Sun’s place in the universe The Sun’s place in the solar system The Sun’s structure The dynamic Sun Eclipses on Earth

46. Total Solar Eclipse

47. Path of totality

48. Annular Solar eclipse

49. 2006 Eclipse sequence

50. Partial 1/3 of Sun

51. Partial 2/3 of Sun

52. Partial almost totality

53. Diamond Ring

54. Inner Corona

55. Middle Corona

56. Outer Corona and Moon

57. Composite - 22 images

58. Composite - 26 images

59. Diamond Ring

60. 12 min. after totality

61. 27 minutes after

62. Almost over

63. Lunar Eclipse

64. 2000 Eclipse

65. Lunar eclipse movie

67. Thank you! alex.young@gsfc.nasa.gov