Each discovery in turn was, according to the prevailing custom, announced to the learned world under the veil of an anagram - removed, in the case of the first, by the publication, early in 1656, of the little tract De Saturni luna observatio nova; but retained, as regards the second, until 1659, when in the Systema Saturnium the varying appearances of the so-called "triple planet" were clearly explained as the phases of a ring inclined at an angle of 28° to the ecliptic. Huygens was also in 1656 the first effective observer of the Orion nebula; he delineated the bright region still known by his name, and detected the multiple character of its nuclear star.
Early names for it are Lac argenti and Luna cornea, the first referring to its form when freshly precipitated, the latter to its appearance after fusion.
On the 5th of June 1409 was read the definitive sentence: that as heretics, and therefore separated from the Church, Pedro de Luna (Benedict XIII.) and Angelo Corrario (Gregory XII.) were ipso facto deposed from any office; they must not be obeyed, nor assisted, nor harboured.