1. TELESCOPE TOUR

3. Radio and visible waves can go through Earth’s atmosphere

4. Mauna Kea Observatory

5. Optical telescopes Need clear weather Away from city lights (light pollution) Above clouds (mountain tops) –Less distortion Many in AZ and HI

6. REFRACTING TELESCOPES Use multiple lenses to focus light and magnify images.

7. The USNO 26-inch Refracting Telescope

8. REFLECTING TELESCOPES Uses a series of mirrors to gather and focus light.

9. 8” REFLECTOR

10. Keck Observatory 10 m reflector largest in world

11. LBT 2- 8.4 meter mirrors 10x resolution of Hubble

12. REFRACTORS VS REFLECTORS REFRACTORS good for observing solar system objects See details expensive to manufacture (lens, support) Chromatic aberration (halo affect;bad) Smaller- easy to travel with

13. REFLECTORS cheaper to manufacture (mirrors are easier than lenses & mirrors can be supported from behind) See farther than refractors –Lose detail Can build larger (10 meters vs. 1 meter)

14. CATADIOPTRIC TELESCOPES combines the best features of refractors and reflectors

16. Radio telescopes Gather incoming radio waves Convert waves to colors Produce false color images

19. Very Large Array Socorro, NM

20. 40 meter radio telescope Green Bank, WV

21. 305 meter Arecibo Radio Telescope

28. SUPERNOVA REMNANT

29. THE MOON

30. A GALAXY

31. Advantages of Radio Telescopes Use anytime (day, clouds, etc) No dome needed “see” much farther

32. McMath Solar Observatory

38. HUBBLE SPACE TELESCOPE

39. Advantages of Space Telescopes No atm. Interference –See clearer NOT CLOSER Can detect wavelength that atm. blocks

41. Hubble vs. Ground based telescopes

42. Spitzer infrared telescope launched 2003

43. GLAST- gamma ray telescope proposed launch 2006

44. Chandra X-ray telescope launched 1999

45. HUT (HOPKINS UV TELESCOPE) Clumpy universe

46. Milky Way Visible

47. Milky Way Radio

48. Milky Way Gamma rays

49. Milky Way- X Ray