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radial velocity

/ˈreɪdiəl vɪˈlɒsɪti/

翻译: 天体(如恒星或星系)沿观测视线方向的速度分量,天文学中用于测量其接近或远离地球的运动。

1 个条目

phrase

/ˈreɪdiəl vɪˈlɒsɪti/C1formalscientific
  • zh天体(如恒星或星系)沿观测视线方向的速度分量,天文学中用于测量其接近或远离地球的运动。

The component of velocity of an object (such as a star or galaxy) along the line of sight of an observer, used in astronomy to measure motion toward or away from Earth.

  1. Motion along the line of sightC2formal

    The velocity of an object along the line of sight of an observer, measured as the rate of change of distance between the object and the observer.

    zh径向速度

    • Astronomers measure the radial velocity of stars to detect exoplanets.
    • The radial velocity of the galaxy was calculated using the Doppler shift.
    • Changes in radial velocity indicate the presence of a binary companion.