Main Page | See live article | Alphabetical index Horologium (abbreviation Hor, genitive Horologii) is one of the lesser southern constellations (declination around -60 degrees). Originally named Horologium Oscillitorium by Abbé Nicolas Louis de Lacaille, the constellation name has since been shortened to be less cumbersome. Horologium Oscillitorium was to honour the inventor of the pendulum clock, Christian Huygens This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.