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

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Presentation transcript:

ASTR 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) 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)

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)

Landolt Astronomical Observatory Location: roof of Nicholson Hall 11.5-inch refracting telescope

Refracting Telescope: “How it works”

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.

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

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)

Highland Road Park Observatory (BREC park just south of Siegen Lane) 20-inch diameter reflecting telescope

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.

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

Summit of Mauna Kea (Hawaii)

Hubble Space Telescope Operated by: Space Telescope Science Institute in Baltimore, Maryland

Hubble Space Telescope Operated by: Space Telescope Science Institute in Baltimore, Maryland 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 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)

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)

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

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

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)

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)

Spitzer

Spitzer Space Telescope (infrared)

Hubble

Hubble Space Telescope (visible & UV) Operated by: Space Telescope Science Institute in Baltimore, Maryland

Chandra & XMM

Chandra X-ray Observatory

Compton GRO

Compton Gamma-Ray Observatory (CGRO)