Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       Caelum veter. - region of the fixed stars
         (Constellation) Libra veter. - Lib
           (Planetary system) Gliese 581
           144919.1-140856 (Star system) μ Librae
           145041.2-155950 (Star system) α¹ Librae
           145052.7-160230 (Star system) α² Librae - Zubenelgenubi
           145422.9-115354 (Star) ξ¹ Librae
           145646.1-112435 (Star) ξ² Librae
           150058.4-083108 (Star system) δ Librae
           150404.2-251655 (Star) σ Librae
           150637.6-161525 (Star) ν Librae
           151213.3-194730 (Star system) ι¹ Librae
           151319.2-193851 (Star) ι² Librae
           151700.4-092259 (Star) β Librae - Zubeneschamali
           152101.4-153254 (Star system) ο Librae
           152411.9-101920 (Star) ε Librae
           152815.4-164259 (Star) ζ¹ Librae
           153040.4-163634 (Star) ζ³ Librae
           153255.2-165110 (Star) ζ⁴ Librae
           153531.6-144722 (Star system) γ Librae
           153701.5-280806 (Star system) υ Librae
           153839.4-294640 (Star) τ Librae
           154156.8-194044 (Star system) κ Librae
           154404.4-154022 (Star) η Librae
           155320.1-201002 (Star) λ Librae
           155349.5-164346 (Star) θ Librae