Home > Industry/Domain > Online services
Online services
Any business that provides its subscribers with a wide variety of data transmitted over telecommunications lines, an infrastructure in which they can communicate with one another as well as the means to connect with an almost unlimited number of third-party information providers.
0Categories 5143Terms
Add a new termContributors in Online services
Online services > 
aplanatic system
Astronomy; General astronomy
A system of three lenses which, taken together, correct for spherical aberration, chromatic aberration, and coma.
apocenter
Astronomy; General astronomy
The point in the orbit of one component of a binary system which is farthest from the center of mass of the system.
apogalacticon
Astronomy; General astronomy
The point in a star's orbit farthest from the Galactic center.
apogee
Astronomy; General astronomy
The point at which a body in orbit around the Earth reaches its farthest distance from the Earth.
apparent magnitude
Astronomy; General astronomy
1) A measure of how bright a star looks in the sky. The brighter the star, the smaller the apparent magnitude. A star that is one magnitude brighter than another (e.g., +1 versus ...
apsidal motion
Astronomy; General astronomy
Rotation of the line of apsides in the plane of the orbit; (in a binary) precession of the line of apsides due to mutual tidal distortion.
