Sentences with phrase «certain spectral lines»
The new discoveries were made with the help of the radial velocity method, which looks for the periodic shifts of certain spectral lines in a star's light that are caused by the gravitational tug of invisible planets which orbit the star.
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For example, 59 Cygni is listed as spectral type B1.5 Vnne, [34] indicating a spectrum with the general classification B1.5 V, as well as very broad absorption lines and certain emission lines.