TO OBSERVE THE NIGHT SKIES, AN ASTRONOMER NEEDS AN ASTRONOMICAL OBSERVATORY.
THE TELESCOPE IS POWERFUL, BUT NOT STRONG ENOUGH TO SEE THRU A SOLID ROOF, SO THE ROOF WILL ROLL AWAY.
A CONCRETE SLAB AND A STACK OF 2X4s. READY TO GO.
BENEATH THIS CONCRETE SLAB IS A MASSIVE FOOTING FOR THE TELESCOPE BASE. WHILE EXCAVATING, I DISCOVERED AN OLD DRIVEWAY BURIED UNDER THE BACKYARD, SO I TIED THE FOOTING TO THAT SUBTERRANEAN SLAB.
THE FIRST WALL GOES UP...
...AND THE SECOND.