Rollamatic barrel-shaped skylight
This is a good picture to use for a retractable skylight quiz. Here goes!
Q: What type of skylight is this?
A: It's a center-third-operable barrel. (If you look along the left edge of the skylight, you can see that the middle third sits on top of either end.
Q: Is it motorized? How can you tell?
A: Yes, that box on the end of the middle section is the giveaway - it contains the motor.
Q: Which direction does the center-third retract to?
A: To retract, a section needs tracks to roll on. You can see a track on this side of the center section, but not the far side. So it retracts toward the camera.
Q: How big is this skylight?
A: It's larger than it looks. That box enclosing the motor is about one foot by one-foot. The size of the opening: about 15' by 30'.