If a star moves to you, - then all the lines — will be blue-shifted.

如果恒星靠近你，那么所有的光线-，都会蓝光偏移。

youdao

And if the star moves away from you, all the lines will be red-shifted.

如果恒星远离你，所有线都会红光偏移。

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

Far better to use a broadcast signal, which we can target at a specific star, and which moves at the speed of light.

FORBES

Since Kepler finds planets by measuring the tiny dips in a star's brightness when a dark planet moves across the face of that star, less accurate photometry means Earth-like planets will be too hard to find.

CNN: Kepler or not, we'll find life in space

United have been linked with moves to sign Bayern Munich's France star Franck Ribery and Wigan's Ecuador winger Antonio Valencia as Ferguson seeks to replace Ronaldo.

CNN: United accept record $130M offer for Ronaldo