The shape of this orbit isn't consistent; it varies over time, over a period of about a thousand years.

轨道的形状并不是始终如一的；它会随时间变化，变化周期为一百年左右。

youdao

And out of this information you get the radius, the velocity and the period, assuming that you are on Earth in the plane of the orbit of the stars.

除了这个，还能得到半径的大小，速度以及周期，假设你在地球上，和这些恒星环绕的，轨道同处一个平面。

youdao

That means you can get the speed of the neutron star, you can get the radius of the orbit, and you can get the period, just like we discussed before.

中子星的速率,得到轨道的半径，得到周期的大小，如之前讨论过的那样，现在取一个光学的。

youdao

To do this the satellite would need to be in a synchronous orbit (one whose orbital period is the same as the period of revolution of the planet underneath), and the descending cable would have to be counterbalanced by an ascending one extending off into space.

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That is because the two smaller stars orbit each other in 0.9 days, whereas the expected period of oscillations from the red giant's rumblings is almost exactly half that.

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