tar so'i mei lujvo

s₁ is a/the galaxy (default is the Milky Way)

Cf. tarci, so'imei, sostartai, tarboi, tarci'e, "galki" (which is a gismu and does not reference stars specifically).

In notes:

sostartai: x₁= tai₁ is a constellation of stars x₂= tar₁ (set, quantity, region), according to standard x₃.
tarboi: b₁ is a globular cluster consisting of stars with properties t₂.
tarci'e: c₁ is a solar/stellar system based on star(s) t₁ (default is the Solar System) with stellar properties t₂ with components c₃ displaying c₄ (ka).
tartai: tarm₁ tartai tarc₂.
kardacevo: x₁ [mass of properties describing skills, technological advances] is a civilization of x₂ (mass of persons) manifesting Type x₃ (number) on the Kardashev scale of technological advancement according to standard/particular scale/definition x₄.