أنظمة الإحداثيات الفلكية

Dr / Saad Abbas al-Janabi. ((Astronomical coordinate systems)) Introduction: To designate the location of any object in space individually, must require a three-digit number, considering that the three-dimensional space. These figures correspond to the length, width and height. For example, we learned from the school, had a system of coordinates, it is clear that there are in numerable possibilities of introduction of the coordinate system coordinate system in space. In practice, it is best astronomy and other sciences dealing with specific systems, which will be described here. And called the numbers that belong to a site or point, name the coordinates of the point coordinates. Usually , we use Cartesian coordinates and satisfaction in transactions in the normal every day purposes the dimensions of length, width and height. Measured from a reference point or a point called the origin (three vectors perpendicular to each other. Or, rather, are the three straight lines called axes and angles, including menus, axes are traditionally gives a sense of trends for x, y, p. Or: (\\\\\\\"X\\\\\\\", \\\\\\\"Y\\\\\\\", \\\\\\\"Z\\\\\\\",). Axes so that the positive direction of the left of the window rectangle. Choose all from the point of origin and axes in the (space). Located every two axes in the standard, although the formation of the coordinates of the three levels in this way represents the feature coordinate system. And sometimes called levels: (X-Y, X-Z, Y-Z.). If possible, measure the position of an object in the same lead in every direction, the system of Cartesian coordinates to be very practical. For example, in many processes, in astronomy, can be measured in the direction of the observer, or land, or even the solar system, where the object to be measured accurately is good, and often at a distance is well known. This is a better measure trends, semi-straight lines from the origin, angles starting from the reference axes, or frames of reference. Can be located in space beyond and by its direction from the reference point, I mean, out of frame of reference set. Direction in space is given by two angles, along with the distance, any three numbers to specify the location. It can take these numbers as a three coordinates, which is called the spherical coordinates spherical coordinate system.