1. Astronomy Chapter 04 : The Sun Sunset over the Giza pyramids

3. Mythology of the Sun Clockwise from left: Egyptian, Greek, Aztec

7. Solar System (AU) 39.5 Pluto 30 Neptune 19.2 Uranus 9.5 Saturn 5.2 Jupiter 1.5 Mars 1.0 Earth 0.7 Venus 0.4 Mercury Distance in AU Planet

10. Solar Projection Solar projection during an eclipse Toward sun

12. Nebular Theory Diagram The sun is believed to have been formed from a rotating disk of gas and dust, similar to the one observed around Beta Pictoris Beta Pictoris

15. Sun Diagram

17. White Light Photosphere The safe solar filter covers the entire aperture of the telescope The solar photosphere can appear granular in a good telescope—note the limb darkening

23. Identify umbra, penumbra, granules Sunspots http://www.spaceweather.com/swpod2006/14aug06/roel.jpg

25. Chromosphere during Eclipse The chromosphere can be seen during eclipses as a red rim around the eclipsed sun

26. Coronado PST Photo & Chromosphere A hydrogen-alpha filtered telescope, such as the Coronado PST, allows observation of the chromosphere at any time

28. Prominences

29. More Prominences http://www.spaceweather.com/swpod2006/09apr06/Chatman.jpg

30. Filaments Dark filament, a prominence on the solar disk Note prominences around the solar limb in this H-Alpha photo

31. Solar Features

33. Totality, Awesome

34. March 2006 http://www.buytelescopes.com/gallery/view_photo.asp?pid=8652&sg=1 Note the face of the moon is faintly visible in this highly processed image

41. Rotation This animation shows the growth and rotation of sunspot 848, Jan. 19 th -21 st 2006 http://www.spaceweather.com/index.cgi

44. Solar Cycles Present

45. Cycle 23 (as of 2006) In what year did solar maximum occur? Minimum?

46. Current Cycle http://www.swpc.noaa.gov/SolarCycle/

50. Sunspot Magnetism Sunspots often appear in pairs displaying a north and south pole

53. Solar Flare This image was taken by the Soho satellite, a satellite devoted to observing the sun at various wavelengths

54. Solar Flare Effects

56. Northern Lights

62. Heliopause The heliopause marks the edge of the sun’s influence

64. Vega, the Apex of the Sun’s Way The direction of the sun’s motion through the galaxy is located near the star Vega on the celestial sphere

65. Earth’s Spiral Motion Vega-Apex of the Sun’s Way Earth Sun

67. Sun’s Revolution in Milky Way