This is the Mayall 4-meter telescope dome. Twenty-two louvred vents were installed into the 4-meter's dome in the Summer of 1997 to allow air to flow freely through the dome. This helps improve the image quality, resulting in sharper images with better detail.

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  This is the 4-meter telescope dome before the vents were installed. Eighteen stories high, the Mayall is the highest point on Kitt Peak and can be seen from over fifty miles away.

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  This is the outside of the 4-meter telescope, as seen at sunset. The University of Arizona's Bok 90-inch and Spacewatch 36-inch telescopes sit below the 4-meter.

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  This is the 4-meter telescope. The blue "horseshoe" is the support structure which holds and moves the telescope.

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  This is the 4-meter telescope turned on its side.

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  Sunset as seen from inside the 4-meter telescope dome.

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  This is one of the instruments which can be attached to the bottom of the telescope. It analyzes the light collected by the telescope.

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  This is the control room for the 4-meter telescope. From this location the telescope operator moves the telescope and dome.

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