Umbral Sculpture

Possible References

 * The name, |Umbra, is Latin for "shadow". Umbra is the innermost and darkest part of a shadow, where the light source is completely blocked by the occluding body. An observer in the umbra experiences a total eclipse.
 * The 's description mentions, "syzygy". This is likely a reference to Syzygy, a straight-line configuration of three celestial bodies in a gravitational system.