Also on these boards
It's actually a greenhouse, but I'm thinking a little more broadly in its use.....like building it on the slope of a Montana mountain and looking up at the roof/ceiling to watch the snow fall in Winter and endless constellations in Summer.
Have a lean-to greenhouse! They have the advantage of getting some heat from your house in winter, either heat that would be lost, or if it is very cold, you could open windows into the greenhouse to let your house heating system heat it. Much simpler and less dangerous than any greenhouse heater. On warm sunny winter days, the greenhouse will actually add heat to your house. And Humidity. And Oxygen.