The Observatory could be considered as an extension of the Gallery, on the climber's right or south side. The rock can be seen from the parking lot of the Second Pullout, its most prominent feature is the broad, low angle, smoothed-over arete on the right side. The routes are face climbs, mostly protected with bolts but also with the sporadic gear placements as well. The rock gets sun from late morning throughout the rest of the day. The routes all require double rope rappels.
Getting There
It's possible to traverse south from The Gallery to reach this rock, but I found this way to be pretty exposed and tricky. The more solid approach would be to go to the Stone Wall. From the mouth of Black Corridor, the gully to the north is Sweet Pain, and to the north of that is the Stone Wall gully. Hike to the top of the Stone Wall gully and ramp up the north wall. This brings you directly to The Observatory.