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is transparent. ERAU Astronomical Observatory. Meade 12.375 inch Schmidt Cassegrain Reflecting Telescope. Ground Based Telescopes. Optical Infrared Radio. Refracting Telescope. Refractors Tend to be long…. Reflecting Telescope Designs. Reflecting Telescopes are Compact….

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Erau astronomical observatory

ERAU Astronomical Observatory


Meade 12 375 inch schmidt cassegrain reflecting telescope

Meade 12.375 inch Schmidt Cassegrain Reflecting Telescope


Ground based telescopes

Ground Based Telescopes

Optical

Infrared

Radio


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Refracting Telescope


Refractors tend to be long

Refractors Tend to be long….


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Reflecting Telescope Designs


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Reflecting Telescopes are Compact….


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A Prism Spectrograph


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A Spectrum


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A Modern Spectrograph


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An Electronic Imaging Camera called a CCD


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Angular Resolution


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Angular Resolution depends on two things…

1. The wavelength of light :  (in meters)

2. The size of the telescope mirror (or dish) : D (in meters)

 = 2.5 x 105 /D

 is the angular resolution in arcseconds


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A Radio telescope “dish”


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The Very Large Array (VLA) in New Mexico


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Atmospheric Blurring


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No atmospheric blurring in space….


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Spitzer Space Telescope


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Chandra X-Ray Observatory


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Compton Gamma-Ray Observatory


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The sky at five different wavelengths

a- Visible

b- Radio

c - Infrared

d - X-ray

e - Gamma ray


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