- 업종: 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.
The degree of flattening of an ellipse and how much it deviates from a circular shape. With reference to the orbit of a planet, the distance between the center of its orbit and the center of the primary about which it revolves.
Industry:Astronomy
Backward (westward) motion of the planet among the stars, resulting from the fact that it is viewed from the moving earth. It is the motion that a planet has when its right ascension is decreasing. Each year, when Earth passes a superior planet, such as Mars, the planet appears to move backward for a short time. It is the same effect you see when two trains are running in the same direction on side by side tracks. The slower train appears to be moving backward.
Industry:Astronomy
The hiding of one heavenly body by another, as when the moon passes between earth and a star, or when one of the moons of jupiter or saturn passes behind the planet.
Industry:Astronomy
Laws governing the motions of planets in their orbits:. # the orbits of the planets are ellipses with the sun at a common focus. # the line joining a planet and the sun sweeps over equal areas during equal intervals of time. # the squares of the periods of revolution of any two planets are proportional to the cubes of their mean distances from the sun.
Industry:Astronomy
1. An instrument that provides its data readout to a location remote from the sensing device; 2. To transmit data to a remote point.
Industry:Astronomy
