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ASTR 1101-001 Spring 2008 Joel E. Tohline, Alumni Professor 247 Nicholson Hall [Slides from Lecture22]

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Presentation on theme: "ASTR 1101-001 Spring 2008 Joel E. Tohline, Alumni Professor 247 Nicholson Hall [Slides from Lecture22]"— Presentation transcript:

1 ASTR 1101-001 Spring 2008 Joel E. Tohline, Alumni Professor 247 Nicholson Hall [Slides from Lecture22]

2 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 (  -ray)

3 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 (  -ray)

4 Landolt Astronomical Observatory http://www.phys.lsu.edu/landoltobservatory/index.html Location: roof of Nicholson Hall 11.5-inch refracting telescope

5 Refracting Telescope: “How it works”

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 (  -ray) 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.

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8 40-inch Refractor at Yerkes Observatory (near Chicago, IL)

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10 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 (  -ray)

11 Highland Road Park Observatory (BREC park just south of Siegen Lane) http://www.bro.lsu.edu 20-inch diameter reflecting telescope

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16 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 (  -ray) 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.

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18 Reflecting Telescope: “Gemini North” in Hawaii 1.Primary mirror has a diameter of 8.1 meters 2.Secondary mirror has a diameter of 1.0 meter 3.Hole in primary through which light passes to reach the Cassegrain focus

19 Summit of Mauna Kea (Hawaii)

20 Hubble Space Telescope Operated by: Space Telescope Science Institute in Baltimore, Maryland www.stsci.edu

21 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.

22 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 (  -ray)

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25 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 (  -ray)

26 64-meter “Parkes” Radio Telescope New South Wales, Australia

27 Very Large Array (VLA) of Radio Telescopes Socorro, New Mexico

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29 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 (  -ray)

30 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 (  -ray)

31 Spitzer

32 Spitzer Space Telescope (infrared)

33 Hubble

34 Hubble Space Telescope (visible & UV) Operated by: Space Telescope Science Institute in Baltimore, Maryland www.stsci.edu

35 Chandra & XMM

36 Chandra X-ray Observatory

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38 Compton GRO

39 Compton Gamma-Ray Observatory (CGRO)

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