Modeling and simulation of celestial background

Based on the catalogue data, it is presented an approach for modeling and simulating the celestial background observed in any time and at any places. All this can be done with the Hipparcos catalogue in the following way. First, with a series of time conversion, the star position data of the catalogue epoch is converted into the position data of the named time. Then, the star visional coordinate is converted into the observation coordinate, and the star visional position is achieved in accordance with the observe at the named time. Finally, the celestial background at various observing time and places can be rendered using the modeling result.