Celestial mechanics Celestial mechanics Celestial mechanics is the branch of astronomy that deals with the motions of objects in outer space. Historically, celestial mechanics applies principles of physics (classical mechanics) to astronomical objects, such as stars and planets, to produce ephemeris data. As an astronomical field of study, celestial mechanics includes the sub-fields of orbital mechanics, which deals with the launching and orbits artificial satellites, and lunar theory, a specialty which deals with the complications of the orbit of the Moon. Modern celestial mechanics tends to divide between five broad fields of study: All of the above fields overlap, but are sometimes
Liberty (goddess) Liberty (goddess) Liberty is a loose term in English for the goddess or personification of the concept of liberty, and is represented by the Roman Goddess Libertas, by Marianne, the national symbol of France, and by many others. The Statue of Liberty ("Liberty Enlightening the World") by Frédéric Auguste Bartholdi is a well-known example in art, a gift from France to the United States. The ancient Roman goddess Libertas was honored during the second Punic War by a temple erected on the Aventine Hill in Rome by the father of Tiberius Gracchus. A statue in her honor also was raised