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Dark Night Skies: Kitt Peak and the Tohono O’Odham Nation

Dark Night Skies: Kitt Peak and the Tohono O’Odham Nation. “This space telescope is not working as well as we would like!”. Spitzer Space Telescope in the Clean Room. Spitzer Infrared Space Telescope. Overview of Talk. Why do we need black surfaces? Is black a color?

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Dark Night Skies: Kitt Peak and the Tohono O’Odham Nation

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Presentation Transcript

  1. NOAO Public Affairs and Educational Outreach

  2. Dark Night Skies:Kitt Peak and the Tohono O’Odham Nation

  3. “This space telescope is not working as well as we would like!”

  4. Spitzer Space Telescope in the Clean Room

  5. Spitzer Infrared Space Telescope

  6. Overview of Talk • Why do we need black surfaces? • Is black a color? • How do we make something become “black”? • Examples of black surfaces • Designing surfaces--micro-architect?

  7. Is Black a Color? Yes, but …. Black depends on light levels We can measure “blackness”

  8. Kinds of Surfaces-vocabulary • “Diffuse” (rough) • “Specular” (smooth) They reflect light very differently!

  9. Reflections are everywhere--even glass lenses reflect

  10. Coatings are important for telescopes

  11. Painted Surface Up Close

  12. Tungsten Hexafluoride(Grown surface)

  13. Etched Surface (nickel)

  14. Cross sectional view of surface

  15. Anodized Surface (Martin Black)

  16. How things look depends on the wavelength …

  17. Graphs Speak to You!

  18. New Surface for Absorbing

  19. What is black? • Non-reflective and absorptive • Black is related to wavelength • Specular black surfaces and diffuse black surfaces • Surfaces roughness helps make a surface black

  20. Come Visit Kitt Peak!

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