視し線せん速そく度ど

noun

radial velocity; line-of-sight velocity

Astronomical term for the velocity of an object along the line of sight, measured via Doppler shift. Used in professional and educational contexts.

• 視し線せん速そく度どの測そく定ていから、その星ほしが周しゅう期き的てきに動うごいていることがわかった。

  From measurements of radial velocity, it was found that the star moves periodically.

• 視し線せん速そく度ど法ほうは系けい外がい惑わく星せいの発はっ見けんに使つかわれる。

  The radial velocity method is used to discover exoplanets.