Astronomy Lab 6

Built the walls and did the basic assembly.  There is more buttressing to do on each face and some alignment issues that I have to work out.  But the basic shape minus the roof is done. 

The interior is going to be a open double helix.  The stairs are done so just have to finish each level. 
First Floor

Second Floor

Third Floor

More internal details are needed and then I have to figure out the roof.  It will have to have a telescope of some kind but I have not stumbled on a design that I like.