astr 1101-001 spring 2008
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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) - PowerPoint PPT PresentationTRANSCRIPT
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ASTR 1101-001Spring 2008
Joel E. Tohline, Alumni Professor
247 Nicholson Hall
[Slides from Lecture22]
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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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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)
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Landolt Astronomical Observatory
http://www.phys.lsu.edu/landoltobservatory/index.html
Location: roof of Nicholson Hall
11.5-inch refracting telescope
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Refracting Telescope: “How it works”
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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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40-inch Refractor at Yerkes Observatory(near Chicago, IL)
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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)
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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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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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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
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Summit of Mauna Kea (Hawaii)
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Hubble Space Telescope
Operated by:Space Telescope Science Institutein Baltimore, Marylandwww.stsci.edu
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Hubble Space Telescope
Operated by:Space Telescope Science Institutein Baltimore, Marylandwww.stsci.edu
NOTE: Hubble does not have aparticularly large primary mirror.Hubble images are not “fuzzy,”however, because its view of objectsis unhampered by atmospheric turbulence.
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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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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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64-meter “Parkes” Radio TelescopeNew South Wales, Australia
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Very Large Array (VLA) of Radio TelescopesSocorro, New Mexico
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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)
![Page 30: ASTR 1101-001 Spring 2008](https://reader036.vdocument.in/reader036/viewer/2022081504/56814834550346895db554a6/html5/thumbnails/30.jpg)
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)
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Spitzer
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Spitzer Space Telescope (infrared)
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Hubble
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Hubble Space Telescope (visible & UV)
Operated by:Space Telescope Science Institutein Baltimore, Marylandwww.stsci.edu
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Chandra & XMM
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Chandra X-ray Observatory
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Compton GRO
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Compton Gamma-Ray Observatory (CGRO)
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