Looks like a skylight or solar power thing...
Skylight? Yeah right, ain't nothing in that attic but heating equipment.

EDIT: Actually, at the moment the only thing that's up there is some roof tiles left over. If one of the tiles currently on my roof gets damaged in any way, I still have the original type to replace them with. And in the future, besides the heating equipment, it's also going to serve as a big storage room.

Solar power on the other hand... almost right. Nah, this one's just for water-heating purposes. Solar power (electricity) is planned for next year. Have to take into account the limit on tax reductions after all.
