Delphic Expanse spheres
Delphic Expanse spheres.

Numbered 
 Sphere 1
 Sphere 2
 12th Sphere (Triannon designation)
 Sphere 41

Unnumbered

Rendezvous sphere 

Enterprise rendezvoused with Degra's ship behind the cloaking barrier of a sphere so that Captain Archer could show Degra and Jannar evidence of the Guardians' duplicity. It was not far from the Azati Prime system and about a dozen light years from the Xindi Council planet. ()

Xindi Council planet sphere 

A sphere just outside the solar system containing the Xindi Council planet. An Enterprise team went inside it to steal its redundant memory core. Corporal F. Hawkins was vaporized on the mission. ()

Attack sphere 

The Sphere-Builders used a sphere to generate anomalies to protect the Xindi weapon from an attack by the Arboreals, Primates, and Aquatics. ()

Delphic Expanse