axis of precession
121Gregorian calendar — For the calendar of religious holidays and periods, see Liturgical year. For this year s Gregorian calendar, see Common year starting on Saturday. 2011 in other calendars Gregorian calendar 2011 MMXI …
122Magnetic moment — Electromagnetism Electricity · …
12310 Hygiea — 10 Hygiea   …
124History of science in early cultures — The history of science in early cultures refers to the study of protoscience in ancient history, prior to the development of science in the Middle Ages. In prehistoric times, advice and knowledge was passed from generation to generation in an… …
125Rabi problem — The Rabi problem concerns the response of an atom to an applied harmonic electric field, with an applied frequency very close to the atom s natural frequency. It provides a simple and generally solvable example of light atom interactions.… …
126Ceres (dwarf planet) — For other uses of the name Ceres , see Ceres. Ceres   Ceres as seen by Hubble Space Telescope (ACS). The …
127Theories about Stonehenge — Stonehenge has been subjected to many theories about its origin, ranging from the academic worlds of archaeology to explanations from mythology and the paranormal.Early interpretationsMany early historians were influenced by supernatural… …
128Angular momentum — For a generally accessible and less technical introduction to the topic, see Introduction to angular momentum. Classical mechanics Newton s Second Law …
