inertial coordinate system
1213-axis stabilized spacecraft — 3 axis stabilisation is a design feature of most modern spacecraft whereby the spacecraft utilizes sensor readings to determine how actuators on the spacecraft can be used to keep it in a desired attitude, or orientation in space. Description A… …
122Fundamental station — A Fundamental point (in German Fundamentalpunkt ) is the geometric origin of a geodetic network and defines the geodetic datum of a national survey.Some fundamental stations are an astronomical or satellite geodetic observatory. In any case, the… …
123Viscosity — For other uses, see Viscosity (disambiguation). Viscosity The substance above has lower viscosity than the substance below SI symbol: μ, η SI unit: Pa·s  …
124Theoretical motivation for general relativity — A Theoretical motivation for general relativity, including the motivation for the geodesic equation and the Einstein field equation, can be obtained from special relativity by examining the dynamics of particles in circular orbits about the earth …
125Circular motion — Classical mechanics Newton s Second Law History of classical mechanics  …
126Stress-energy-momentum pseudotensor — In the theory of general relativity, a stress energy momentum pseudotensor, such as the Landau Lifshitz pseudotensor, is an extension of the non gravitational stress energy tensor which incorporates the energy momentum of gravity. It allows the… …
127Free body diagram — A free body diagram is a pictorial representation often used by physicists and engineers to analyze the forces acting on a free body. It shows all contact and non contact forces acting on the body. Drawing such a diagram can aid in solving for… …
128Milky Way — This article is about the galaxy. For other uses, see Milky Way (disambiguation). Milky Way galaxy Image of the Milky Way s Galactic Center in the night sky above Paranal Observatory Observation data …
