Definition of radial velocity in English:

radial velocity

noun

Astronomy

The velocity of a star or other body along the line of sight of an observer.
〔主天文〕视向速度
Example sentencesExamples
- The first truly threedimensional largescale survey of the universe was made by Valérie de Lapparent and colleagues, who published radial velocities and positions for a large sample of galaxies.
- Most of them are detected by indirect methods, based either on variations of the radial velocity or the dimming of the star as the planet passes in front of it.
- With this tool, researchers can measure changes in the radial velocity of a star to an accuracy of 1m a second.
- They are part of a large programme aimed at measuring accurate radial velocities for sixty stars for which a temporary brightness ‘dip’ has been detected during the OGLE survey.
- By taking very careful measurements of the ‘radial velocities,’ the researchers were able to determine precisely how each star was moving in relation to the galaxy.

Definition of radial velocity in US English:

radial velocity

noun

Astronomy

The velocity of a star or other body along the line of sight of an observer.
〔主天文〕视向速度
Example sentencesExamples
- They are part of a large programme aimed at measuring accurate radial velocities for sixty stars for which a temporary brightness ‘dip’ has been detected during the OGLE survey.
- The first truly threedimensional largescale survey of the universe was made by Valérie de Lapparent and colleagues, who published radial velocities and positions for a large sample of galaxies.
- By taking very careful measurements of the ‘radial velocities,’ the researchers were able to determine precisely how each star was moving in relation to the galaxy.
- Most of them are detected by indirect methods, based either on variations of the radial velocity or the dimming of the star as the planet passes in front of it.
- With this tool, researchers can measure changes in the radial velocity of a star to an accuracy of 1m a second.

词汇	radial velocity
释义	Definition of radial velocity in English: radial velocity noun Astronomy The velocity of a star or other body along the line of sight of an observer. 〔主天文〕视向速度 Example sentencesExamples The first truly threedimensional largescale survey of the universe was made by Valérie de Lapparent and colleagues, who published radial velocities and positions for a large sample of galaxies. Most of them are detected by indirect methods, based either on variations of the radial velocity or the dimming of the star as the planet passes in front of it. With this tool, researchers can measure changes in the radial velocity of a star to an accuracy of 1m a second. They are part of a large programme aimed at measuring accurate radial velocities for sixty stars for which a temporary brightness ‘dip’ has been detected during the OGLE survey. By taking very careful measurements of the ‘radial velocities,’ the researchers were able to determine precisely how each star was moving in relation to the galaxy. Definition of radial velocity in US English: radial velocity noun Astronomy The velocity of a star or other body along the line of sight of an observer. 〔主天文〕视向速度 Example sentencesExamples They are part of a large programme aimed at measuring accurate radial velocities for sixty stars for which a temporary brightness ‘dip’ has been detected during the OGLE survey. The first truly threedimensional largescale survey of the universe was made by Valérie de Lapparent and colleagues, who published radial velocities and positions for a large sample of galaxies. By taking very careful measurements of the ‘radial velocities,’ the researchers were able to determine precisely how each star was moving in relation to the galaxy. Most of them are detected by indirect methods, based either on variations of the radial velocity or the dimming of the star as the planet passes in front of it. With this tool, researchers can measure changes in the radial velocity of a star to an accuracy of 1m a second.
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