The velocity of a star or other body along the line of sight of an observer.
- 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.
- 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.
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