Epsilon Coronae Borealis
... that the radial velocity of the star Epsilon Coronae Borealis had been observed for seven years before the discovery of its planet was announced?
... that the <a href="./Methods_of_detecting_exoplanets#Radial_velocity" id="mwBgY" rel="mw:WikiLink" title="Methods of detecting exoplanets">radial velocity</a> of the star <b id="mwBgc"><a href="./Epsilon_Coronae_Borealis" id="mwBgg" rel="mw:WikiLink" title="Epsilon Coronae Borealis">Epsilon Coronae Borealis</a></b> had been observed for seven years before the discovery of its <a href="./Exoplanet" id="mwBgk" rel="mw:WikiLink" title="Exoplanet">planet</a> was announced?