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The DENIS survey of the entire southern sky is beginning observations this year. It will return one million images, representing 4 Terabytes, among which nearly stars and up to one million galaxies. The main extragalactic applications of such a multi-band, digital, near-IR 2D survey are listed, and the importance and feasibility of a spectroscopic followup are discussed. First estimates of the capabilities for galaxy extraction are given, and illustrated with preliminary images of three very bright galaxies.

生成讲解博客的中文版本

生成AI智能校验的中文版本