Hi Dr.M, My table isn't as hi tech as Mike's

but it does get the job done.
I will be making a hood for it, to keep the dew out.
Just some 3ply for the base and some decorative edging.
A couple of coats of marine varnish keep everything protected.
The legs are off my kids old swimming pool and the tube is plastic water pipe.
The table can be swivelled so that you can orientate for the changes in the sky. John.