Irresolvable /(?)/

Ir·re·solv·a·ble

Irresolvable

a.
  1. Incapable of being resolved; not separable into component parts.

Phrases & Compounds
Irresolvable nebulæ
nebulæ of a cloudlike appearance, which have not yet been resolved by the telescope into stars, and are often distant galaxies. See galaxy{2}.