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polystyrene sheets
My Take,
One hot day last summer my eye pieces which are stored in a sealed tupper ware style box were still hot after the ob had been opened for a couple of hours and had cooled down. The box is stored in a pod on the western side of my Sirius dome. For an experiment the western wall of the the pod had a cut up piece of packing polystyrene
inserted. Yep, cool(er) eye pieces. So I bought 6 sheets (8ft x 4ft) of 10 mm poly foam.
Silastic was just strong enough to hold the sheets to the curved wall.
This has been successful. I have not taken the temperature in the ob but after a 40 degree day the ob is pleasantly cool but the massive steel pier is still a little warm to touch.
Chris
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