Radialhastighetsmålingar
Radialhastighetsmålingar, often translated as radial velocity measurements, is a technique used primarily in astronomy to determine the velocity of celestial objects along the line of sight from the observer. This velocity is known as radial velocity. The principle behind radial velocity measurements relies on the Doppler effect. When a light source moves towards an observer, the emitted light waves are compressed, causing their wavelengths to shift towards the blue end of the spectrum (blueshift). Conversely, if the light source moves away from the observer, the light waves are stretched, shifting their wavelengths towards the red end of the spectrum (redshift).
Astronomers measure these shifts in the spectral lines of a star or galaxy. Each element has a