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The VizieR Catalogue Service is anastronomical catalog service provided byCentre de données astronomiques de Strasbourg (CDS, Strasbourg Data Centre for astronomy). The origin of the service dates back to 1993, when it was founded by theEuropean Space Agency as theEuropean Space Information System (ESIS) Catalogue Browser. Initially intended to serve the space science community, the ESIS project pre-dates the World Wide Web as a network database allowing uniform to a heterogeneous set of catalogues and data.
The CDS had for years collected and disseminated astronomical data, so the original ESIS Catalogue Browser was transferred to and stored there. Since its inception in 1996, VizieR has become a reference point for astronomers worldwide engaged in research, who come to access catalogued data regularly published in astronomical journals. The new VizieR service was refurbished in 1997 by the CDS to better serve the community in terms of searching capabilities and data volume. As of February 2021 it contains more than 20000 catalogues.[1] It is a major data source as part of theVirtual Observatory.