| − | Instead of mapping the position of the star against the background, it is also possible to detect the minute [[Doppler shift]] in the star's spectrum as it is tugged by the planet. This method is responsible for the majority of extrasolar planet detection. | + | Instead of mapping the position of the star against the background, it is also possible to detect the minute [[Doppler-shift]] in the star's spectrum as it is tugged by the planet. This method is responsible for the majority of extrasolar planet detection. |