Astrometric Catalogue 5, LQAC-5
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In addition to their great astrophysical interest, quasars represent quasi-ideal reference objects in the celestial sphere with, a priori, a lack of significant proper motion....
除具备显著的天体物理学研究价值外,类星体(quasars)亦是天球上的准理想参考天体,其先验地不存在显著的自行……



