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ASTR 1101-001 Spring 2008 Joel E. Tohline, Alumni Professor 247 Nicholson Hall [Slides from Lecture22] Telescopes (Chapter 6) Traditional ground-based optical telescopes Refracting (light passes through a lens) Reflecting (light bounces off a concave mirror)

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astr 1101 001 spring 2008

ASTR 1101-001Spring 2008

Joel E. Tohline, Alumni Professor

247 Nicholson Hall

[Slides from Lecture22]

telescopes chapter 6
Telescopes (Chapter 6)
  • Traditional ground-based optical telescopes
    • Refracting (light passes through a lens)
    • Reflecting (light bounces off a concave mirror)
  • Telescopes for wavelengths outside the visible part of the EM spectrum
    • Ground-based radio telescopes and telescope arrays
    • Space-based satellite telescopes
      • SIRTF (infrared)
      • Hubble Space Telescope (visible and ultraviolet)
      • Chandra & XMM (x-ray)
      • GRO (g-ray)
telescopes chapter 63
Telescopes (Chapter 6)
  • Traditional ground-based optical telescopes
    • Refracting (light passes through a convex lens)
    • Reflecting (light bounces off a concave mirror)
  • Telescopes for wavelengths outside the visible part of the EM spectrum
    • Ground-based radio telescopes and telescope arrays
    • Space-based satellite telescopes
      • SIRTF (infrared)
      • Hubble Space Telescope (visible and ultraviolet)
      • Chandra & XMM (x-ray)
      • GRO (g-ray)
landolt astronomical observatory
Landolt Astronomical Observatory

11.5-inch refracting telescope

Location: roof of Nicholson Hall

http://www.phys.lsu.edu/landoltobservatory/index.html

telescopes chapter 66
Telescopes (Chapter 6)

NOTE: A large lens is advantageous because it can collect

more light in a given amount of time. The collecting area

goes as the square of the radius of the lens.

  • Traditional ground-based optical telescopes
    • Refracting (light passes through a lens)
    • Reflecting (light bounces off a concave mirror)
  • Telescopes for wavelengths outside the visible part of the EM spectrum
    • Ground-based radio telescopes and telescope arrays
    • Space-based satellite telescopes
      • SIRTF (infrared)
      • Hubble Space Telescope (visible and ultraviolet)
      • Chandra & XMM (x-ray)
      • GRO (g-ray)
telescopes chapter 610
Telescopes (Chapter 6)
  • Traditional ground-based optical telescopes
    • Refracting (light passes through a convex lens)
    • Reflecting (light bounces off a concave mirror)
  • Telescopes for wavelengths outside the visible part of the EM spectrum
    • Ground-based radio telescopes and telescope arrays
    • Space-based satellite telescopes
      • SIRTF (infrared)
      • Hubble Space Telescope (visible and ultraviolet)
      • Chandra & XMM (x-ray)
      • GRO (g-ray)
highland road park observatory brec park just south of siegen lane
Highland Road Park Observatory(BREC park just south of Siegen Lane)

20-inch diameter reflecting telescope

http://www.bro.lsu.edu

telescopes chapter 616
Telescopes (Chapter 6)

NOTE: A large mirror is advantageous because it can

collect more light in a given amount of time. The collecting

area goes as the square of the radius of the mirror.

  • Traditional ground-based optical telescopes
    • Refracting (light passes through a lens)
    • Reflecting (light bounces off a concave mirror)
  • Telescopes for wavelengths outside the visible part of the EM spectrum
    • Ground-based radio telescopes and telescope arrays
    • Space-based satellite telescopes
      • SIRTF (infrared)
      • Hubble Space Telescope (visible and ultraviolet)
      • Chandra & XMM (x-ray)
      • GRO (g-ray)
reflecting telescope gemini north in hawaii
Reflecting Telescope:“Gemini North” in Hawaii
  • Primary mirror has a diameter of 8.1 meters
  • Secondary mirror has a diameter of 1.0 meter
  • Hole in primary through which light passes to reach the Cassegrain focus
slide20

Hubble Space Telescope

Operated by:

Space Telescope Science Institute

in Baltimore, Maryland

www.stsci.edu

slide21

Hubble Space Telescope

Operated by:

Space Telescope Science Institute

in Baltimore, Maryland

www.stsci.edu

NOTE: Hubble does not have a

particularly large primary mirror.

Hubble images are not “fuzzy,”

however, because its view of objects

is unhampered by atmospheric

turbulence.

telescopes chapter 622
Telescopes (Chapter 6)
  • Traditional ground-based optical telescopes
    • Refracting (light passes through a lens)
    • Reflecting (light bounces off a concave mirror)
  • Telescopes for wavelengths outside the visible part of the EM spectrum
    • Ground-based radio telescopes and telescope arrays
    • Space-based satellite telescopes
      • SIRTF (infrared)
      • Hubble Space Telescope (visible and ultraviolet)
      • Chandra & XMM (x-ray)
      • GRO (g-ray)
telescopes chapter 625
Telescopes (Chapter 6)
  • Traditional ground-based optical telescopes
    • Refracting (light passes through a lens)
    • Reflecting (light bounces off a concave mirror)
  • Telescopes for wavelengths outside the visible part of the EM spectrum
    • Ground-based radio telescopes and telescope arrays
    • Space-based satellite telescopes
      • SIRTF (infrared)
      • Hubble Space Telescope (visible and ultraviolet)
      • Chandra & XMM (x-ray)
      • GRO (g-ray)
slide26

64-meter “Parkes” Radio Telescope

New South Wales, Australia

telescopes chapter 629
Telescopes (Chapter 6)
  • Traditional ground-based optical telescopes
    • Refracting (light passes through a lens)
    • Reflecting (light bounces off a concave mirror)
  • Telescopes for wavelengths outside the visible part of the EM spectrum
    • Ground-based radio telescopes and telescope arrays
    • Space-based satellite telescopes
      • SIRTF (infrared)
      • Hubble Space Telescope (visible and ultraviolet)
      • Chandra & XMM (x-ray)
      • GRO (g-ray)
telescopes chapter 630
Telescopes (Chapter 6)
  • Traditional ground-based optical telescopes
    • Refracting (light passes through a lens)
    • Reflecting (light bounces off a concave mirror)
  • Telescopes for wavelengths outside the visible part of the EM spectrum
    • Ground-based radio telescopes and telescope arrays
    • Space-based satellite telescopes
      • Spitzer Space Telescope (infrared)
      • Hubble Space Telescope (visible and ultraviolet)
      • Chandra & XMM (x-ray)
      • Compton Gamma-Ray Observatory (g-ray)
slide34

Hubble Space Telescope (visible & UV)

Operated by:

Space Telescope Science Institute

in Baltimore, Maryland

www.stsci.edu