标签：#1849年发现的小行星

健神星

外部連結 [https://www.myminifactory.com/object/3d-print-10-hygiea-3d-model-103912 3D model of asteroid Hygiea] [http://orbitsimulator.com/gravity/articles/ceres.html A simulation of the orbit of Hygiea] [https://www.youtube.…