Then as the star moves around the center of mass, you see that all these lines drift in unison.

随着恒星绕在，质量中心转动，你能看到所有这些线，一致得移动。

youdao

Then as the star moves around the center of mass, you see that all these lines drift in unison.

随着恒星绕在，质量中心转动，你能看到所有这些线，一致得移动。

youdao