继公认良久的冥卫一(卡戎)及最近观察到的尼克斯卫星和许德拉卫星之后，它成为围绕这颗遥远星球运行的第四个实体。

It becomes the fourth object known to be circling the distant world after the long-recognised Charon and recently observed Nix and Hydra satellites.

youdao

继公认良久的冥卫一(卡戎)及最近观察到的尼克斯卫星和许德拉卫星之后，它成为围绕这颗遥远星球运行的第四个实体。

It becomes the fourth object known to be circling the distant world after the long-recognised Charon and recently observed Nix and Hydra satellites.

youdao