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SpaceEngine (stylized as "Space Engine") is a proprietary 3D astronomy program and game engine developed by Russian astronomer and programmer Vladimir Romanyuk. Using real astronomical catalogs and procedural generation, it creates a three-dimensional planetarium representing the entire universe. Users can travel through space in any direction or speed, and forwards or backwards in time. SpaceEngine is in beta status, and is currently freeware for Microsoft Windows. It uses pseudo-random numbers to procedurally create any kind of planetary system, nebula or galaxy. One of the main features of the program is its scientific accuracy. Cataloged objects are based on real data, while procedural objects are built around the cataloged universe using realistic generation algorithms. Properties of objects, such as temperature, mass, radius, etc., are presented to the user on the HUD and in an accessible information window. Users can observe objects from small spacecraft to galaxy clusters, similar to other simulators such as Celestia. SpaceEngine includes thousands of real objects, including stars from the Hipparcos catalog, galaxies from the NGC and IC catalogs, several well-known nebulae, and all known extrasolar planets and their stars. ==Navigation== When using SpaceEngine, a user can freely explore the universe using keyboard and mouse commands, including WASD keys. Through a combination of these commands, a user can fly anywhere they wish. A user may selectively travel to any object in the program's universe by selecting it and using the go-to function to travel there automatically. All of the key commands can be changed in SpaceEngine's settings. There are three different modes of camera control. Free mode allows movement without inertia, and the user can set a constant velocity to travel when a navigation key is held down. Spacecraft and aircraft modes enable inertia, and the user sets an acceleration rather than a velocity. Users can travel at any velocity they wish, and are not bound by physical limits. The only difference between spacecraft and aircraft mode is that in aircraft mode the direction of motion follows the orientation of the camera. Objects can be selected either by clicking on them or by searching for and selecting them in a search window. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「SpaceEngine」の詳細全文を読む スポンサード リンク
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