3C 120
... that the active galaxy 3C 120 was given the variable-star designation BW Tauri because of its variability in the visible spectrum?
... that the <a href="./Active_galactic_nucleus" id="mwBbM" rel="mw:WikiLink" title="Active galactic nucleus">active galaxy</a> <b id="mwBbQ"><a href="./3C_120" id="mwBbU" rel="mw:WikiLink" title="3C 120">3C<span id="mwBbY" typeof="mw:Entity"> </span>120</a></b> was given the <a href="./Variable-star_designation" id="mwBbc" rel="mw:WikiLink" title="Variable-star designation">variable-star designation</a> BW<span id="mwBbg" typeof="mw:Entity"> </span>Tauri because of its variability in the <a href="./Visible_spectrum" id="mwBbk" rel="mw:WikiLink" title="Visible spectrum">visible spectrum</a>?