1. Astronomy Light & Telescopes Edwin Hubble and the 48-inch Palomar Telescope in 1949

3. Waves

5. Wavelength Relationship

6. EM Spectrum Short wavelengths Long wavelengths

12. Telescope Designs http://www.aw-wrdsmth.com/scuttlebutt/telescope-daigram.jpg

13. Refractors “ Department store” refractor Modern APO refractor

15. Newtonian & Dobsonian Meade Dobsonian telescope http://www.nachohat.org/images/static/meade_starfinder.jpg Eyepiece Newtonian optical diagram John Dobson

16. 6-in Newtonian on a Dobsonian Mount “ 6-in” indicates that the telescope uses a 6-inch diameter mirror as its main light gathering optic This Orion Telescopes XT6 is an excellent scope for beginners and is reasonably priced

17. Compound Scopes: Schmidt-Cassegrain Cutaway view of an SCT Maksutovs are similar yet use a more curved front lens Main mirror Lens Meade Telescopes 8-inch SCT Eyepiece

19. Refractor Objective Lens http://www.rocketroberts.com/astro/refractor.htm

23. Telescope Formula Examples 8-inch Reflector 2.7-inch Refractor Aperture (mm) 200mm 70mm Focal Length (mm) 900mm 480mm f/Number 900/200=f/4.5 480/70=f/6.8 Magnification (32mm eyepiece) 900/32=28x 480/32=15x

24. Two Scopes

26. Aperture Demo http://www.clarkvision.com/visastro/m51-apert/index.html The animation compares sketches of the Whirlpool Galaxy (M51) through 6, 8, and 12.5 in telescopes

30. Star Scintillation This montage of photographs shows how a single star’s image is distorted over time by atmospheric seeing or turbulence Ideal star image

31. Why do Star’s Twinkle? Turbulent air causes a star’s image to distort

33. Effects of LP http://www.spaceweather.com/swpod2003/20aug03/Carlson1.jpg

34. Kitt Peak LP The view from Kitt Peak National Observatory of the Tuscon, Arizona skyline in 1959 The same skyline in 1972

35. US at Night http://archives.cnn.com/2000/US/08/24/dimming.the.lights.ap/large.usa.lights.jpg

36. Eastern US http://www.seds.org/~aschultz/images/light-pollution/us_nite.gif

38. Earth at Night (Click Below) http://veimages.gsfc.nasa.gov//1438/earth_lights_lrg.jpg

43. Keck “Mirror” http://www.astro.ucla.edu/~seth/albums/images/mirror3.jpg

44. Backyard Observatory Roof rolls off for easy access to sky SCT mounted on a permanent pier aka Mini Keck