Steve Taylor wrote:
Eric wrote:

Hi,

I remember seeing an observatory with an unusual shutter, but I don't
remember where. It was a hemispherical dome which rotated in azimuth,
business as usual. The shutter as a round hole, which was on a
separate sector of the sphere. This sector would rotate as well in
order to change the altitude of the hole. Has anybody seen this ? I
have no idea where I saw this, but it's kind of cool.


Try Here

http://www.spaceguarduk.com/whatsee.htm

Its quite a neat thing.

Steve


That's the idea. Looks like it does exactly the same thing.
Thanks, Steve.

Eric.