megamasers
... that hydroxyl megamasers were used to make the first detection of Zeeman splitting in a galaxy other than the Milky Way?
... that <a class="mw-redirect" href="./Hydroxyl" id="mwE6g" rel="mw:WikiLink" title="Hydroxyl">hydroxyl</a> <b id="mwE6k"><a href="./Megamaser" id="mwE6o" rel="mw:WikiLink" title="Megamaser">megamasers</a></b> were used to make the first detection of <a href="./Zeeman_effect" id="mwE6s" rel="mw:WikiLink" title="Zeeman effect">Zeeman splitting</a> in a <a href="./Galaxy" id="mwE6w" rel="mw:WikiLink" title="Galaxy">galaxy</a> other than the <a href="./Milky_Way" id="mwE60" rel="mw:WikiLink" title="Milky Way">Milky Way</a>?