Caelum
... that when astronomer Lacaille originally charted the constellation Caelum, it was recognized as an "engraver's chisel"?
... that when astronomer <a class="mw-redirect" href="./Nicolas_Louis_de_Lacaille" id="mwCFU" rel="mw:WikiLink" title="Nicolas Louis de Lacaille">Lacaille</a> originally charted the constellation <b id="mwCFY"><a href="./Caelum" id="mwCFc" rel="mw:WikiLink" title="Caelum">Caelum</a></b>, it was recognized as an "engraver's chisel"?