Locating the top of the spiral staircase that you took from the Sitting Room, you find yourself in the Observatory. The night sky is visible through the glass dome overhead, or you could look through the telescope for a closer look. There are also some books lying under a bench, with such ominous words as physics, electronics, and calculus on them. They're probably for starting fires, but Jesse might have been looking through them lately. Other than the workbench, and the couch, there's nothing much else to note up here right now.