gravitational stability
121Precession (astronomy) — In astronomy, precession refers to the movement of the rotational axis of a body, such as a planet, with respect to inertial space. In particular, it refers to the precession of the Earth s rotational axis, also called the precession of the… …
122Breakthrough Propulsion Physics Program — The Breakthrough Propulsion Physics Project (BPP) was a research project funded by NASA from 1996 through 2002, to study various proposals for revolutionary methods of spacecraft propulsion which would require breakthroughs in physics before they …
123Space geostrategy — Geostrategy in space (also referred to as astrostrategy) deals with the strategic considerations of location and resources in outer space territory. In essence, it is the study of the strategic application of resources to the geography of space.… …
124Penrose interpretation — The Penrose interpretation is a prediction of Sir Roger Penrose about the mass scale at which standard quantum mechanics will fail. This idea is inspired by quantum gravity, because it uses both the physical constants hbar and G.Penrose s idea is …
125Air pollution dispersion terminology — describes the words and technical terms that have a special meaning to those who work in the field of air pollution dispersion modeling. Governmental environmental protection agencies (local, state, province and national) of many countries have… …
126Landslide mitigation — Landslides can be triggered by many often concomitant causes. In addition to shallow erosion or reduction of shear strength caused by seasonal rainfall, causes triggered by anthropic activities such as adding excessive weight above the slope,… …
127Кристодулу, Деметриос — Деметриос Кристодулу греч. Δημήτριος Χριστοδούλου …
128radioactivity — /ray dee oh ak tiv i tee/, n. Physics, Chem. the phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element. Also called activity. [1895… …
