Post-concussion syndrome. Post-concussion syndrome, also known as postconcussive syndrome or PCS, is a set of symptoms that may continue for weeks, months, or a year or more after a concussion â a mild form of traumatic brain injury (TBI).
The Equatorial (Celestial) Coordinate System. Equatorial coordinates, also called simply celestial coordinates, are the standard coordinate system for the sky. It is meant for the fixed sphere of the stars within which the Earth and Sun move.
Azimuth and elevation are the two coordinates that define the position of a celestial body (sun, moon) in the sky as viewed from a particular location at a particular time. Letâs say that you wish the sun or moon to be in a determined position in the sky... because you love the composition.