- Industry: Aerospace
- Number of terms: 16933
- Number of blossaries: 2
- Company Profile:
The Executive Branch agency of the United States government, responsible for the nation's civilian space program and aeronautics and aerospace research.
Conceptual basis for celestial positions, aligned with respect to extremely distant objects and utilizing the theory of general relativity. Link.
Industry:Aerospace
The realization of the ICRS provided by the adopted positions of extragalactic objects.
Industry:Aerospace
An imaginary circle on the surface of a sphere whose center is at the center of the sphere.
Industry:Aerospace
Einsteinian distortions of the space-time medium predicted by general relativity theory (not yet directly detected as of March 2010). (Not to be confused with gravity waves.)
Industry:Aerospace
The mutual attraction of all masses in the universe. Newton's Law of Universal Gravitation holds that every two bodies attract each other with a force that is directly proportional to the product of their masses, and inversely proportional to the square of the distance between them. This relation is given by the formula at right, where F is the force of attraction between the two objects, given G the Universal Constant of Gravitation, masses m1 and m2, and d distance. Also stated as Fg = gmm/r2 where Fg is the force of gravitational attraction, M the larger of the two masses, m the smaller mass, and r the radius of separation of the centers of the masses. See also weight.
Industry:Aerospace
Two-way communications mode wherein the spacecraft generates its downlink frequency based upon the frequency of the uplink it receives.
Industry:Aerospace
In telemetry, one particular measurement to which changing values may be assigned. See Chapter 10.
Industry:Aerospace
The inward acceleration of a body revolving around another body.
Industry:Aerospace
The outward-tending apparent force of a body revolving around another body.
Industry:Aerospace
