The attached .gif shows my proposal. At best it might be good enough to measure the angular distance to 15 minutes of a degree (4 parts per thousand). Bill Gottesman
In a message dated 1/4/01 6:31:44 PM Eastern Standard Time, [EMAIL PROTECTED] writes: > Dear List Subscribers, > > I propose a challenge to the tinkering gang: > > Devise and BUILD a dialists' (i.e., shadow-observation- > based) method to measure the apparent angular diameter > of the sun, and to compare its values at the two solstices. > > No glass, or specular-reflective, image-forming elements > are allowed. "Pinholes," opaque or transluscent screens, > shadow-sharpeners, camera obscuras, and opaque-walled > sighting-tubes are permitted. Clocks and watches may be > employed. > > No prize is on offer. The only reward will be the fun of trying, > and perhaps, "bragging rights" for elegance, precision, etc.. > > Bill Maddux Attachment converted: Macintosh HD:SUN TRANSIT.gif (GIFf/JVWR) (00021308)
