The observatory is a 3mx3m garden shed, the walls are 1.8m above the concrete and 75mm below the concrete on the outside, to stop dust and water getting in. the corners are
Fixed to four 75mmx75mm posts for rigidity.
The rails that the roof rolls off are 6m long 30x30 angle iron, and the wheels where made by a friend on a lathe
The roof was originally flat but changed that earlier this year as well as the direction it rolled off, the new roof frame is made out of 75mm x 50mm pine with top hat purling to fix the tin roof to.
The concrete pillar is sunk 1m into the ground with a 75mm thick concrete floor
The whole of the interior walls and roof are insulated with sheets of polystyrene then covered with plywood .
As can be seen most of the material is pre loved, but a coat of paint can do wonders .
It may not be pretty but it works
I don't have a digital camera, this is the best I can do.astroron
