Stairway
Door to Attic
Attic Entrance
The observatory will be built on an elevated/suspended floor somehow within the attic entrance (shown in the images below)
and isolated from the pier/mount. (Not as ideal as say a large concrete block in the earth in a ground level observatory, but you work with what you have. )
Attic Entrance Passage
Attic Entrance Passage
This skylight is situated 3m above the floor of the attic Entrance Passage and is approximately 1.5m x 1.8m in size. It is 3m above 2nd floor level and approximately 7.5m above natural ground level. The elevation will certainly help somewhat in blocking out lights from the neighbors and help with ground level temperature gradients. The skylight will be removed and replaced with a roll of roof which will roll 1.5m towards the NW side.
Through the glass you can see the top ridge dragon of the terracotta roof. This marks the limit of the NE views to no less than about 25-30 degrees. This is more than OK by me and shields the light from Nepean Highway very close by. As an aside the Artificial brightness Level at our home according
lightpollutionmap.info using the World Atlas 2015 data is ~2960 µcd/m^2 which is ~17times brighter than the natural sky brightness at a Dark Site or around SQM = 18.84 mag./arc sec^2 (not too good)
Skylight facing NE ~1.5m x 1.8m
