Carte du Ciel (法文，'天空之图')和摄影目录 (或AC，摄影星图)是两个不同组件联结在一起的庞大国际专案，计划于19世纪末期启动，目地在制做亮度达到11或12等，包含数百万颗微弱恒星的位置。来自世界各地的20个天文台参与这一个持续了数十年的庞大观测计划，并且拍摄了超过22,000张摄影干片。然而，或许是因为计划的规模过于庞大，专案只获得了部分的成功，Carte du Ciel的组件始终未能完成，而摄影星表的部分已经机乎被忽略了近半个世纪的时间。但是，1997年依巴谷星表的出现，使得这些走入历史的干板再度获得重要的发展。

The Carte du Ciel (literally, 'Map of the Sky') and the Astrographic Catalogue (or Astrographic Chart) were two distinct but connected components of a massive international astronomical project, initiated in the late 19th century, to catalogue and map the positions of millions of stars as faint as 11th or 12th magnitude. Twenty observatories from around the world participated in exposing and measuring more than 22,000 (glass) photographic plates in an enormous observing programme extending over several decades. Despite, or because of, its vast scale, the project was only ever partially successful – the Carte du Ciel component was never completed, and for almost half a century the Astrographic Catalogue part was largely ignored. However, the appearance of the Hipparcos Catalogue in 1997 has led to an important development in the use of this historical plate material.