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XEphem
XEphem is a Motif based ephemeris and planetarium program for Unix-like operating systems developed by Elwood C. Downey. ==History== XEphem started as a Unix and Motif conversion of the IBM PC-based ''ephem''. It was initially released in December 1993 with version 2.5. The most recent stable version is 3.7.6 (2013). XEphem's source code is available, but its free usage is restricted for personal and educational purposes only.〔(【引用サイトリンク】url=http://www.clearskyinstitute.com/xephem/download.html )〕 The full set of catalogs is only distributed with a purchase of the commercial version.〔(【引用サイトリンク】url=http://www.clearskyinstitute.com/xephem/purchase.html )〕
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「XEphem」の詳細全文を読む
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