An armillary sphere

A study of an armillary sphere with overlapping metal rings, a central ball, and a turned pedestal on textured paper. Construct the central globe and outer meridian ellipse above the pedestal.

A way into the drawing

1. Establish the construction

   Construct the central globe and outer meridian ellipse above the pedestal.

2. Resolve the main structure

   Tilt the equatorial and inner rings around the same center.

3. Develop the detail

   Resolve each front-and-back ring overlap and build the turned base.

4. Control the values

   Use gray metal planes, black reflection accents and narrow paper highlights.

A small thing to tryTrace each ring through the sphere before deciding which segments are hidden.