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strasbourg astronomical data center services others sesame name resolver dictionary of nomenclature contact us help about the cds coretrustseal partners projects staff contact data publication data access services tools news news blog events help acknowledgement service documentation tutorials faq communication wiki internal english français strasbourg astronomical data center the strasbourg astronomical data center cds is a data center dedicated to the collection and worldwide distribution of astronomical data and related information it is located at the strasbourg astronomical observatory france read more about the cds sorry no page matches the terms key numbers 22 156 718 simbad objects simbad is a database of identifications and bibliography of astronomical objects here is the total number of objects it contains more about simbad 28 038 vizier catalogs vizier is a library of astronomical catalogues here is the total number of catalogues it contains more about vizier 1 490 hips hips stands for hierarchical progressive survey it is a hierarchical scheme for the description storage and access of sky survey data it uses the healpix tessellation of the sky the cds uses hips to show available surveys in aladin and aladinlite more about aladin more about hips 41 761 mocs moc stands for multi order coverage map it is a method aiming to specify arbitrary coverages for sky regions and or time coverages and potentially other dimensions at cds mocs are mostly used in aladin and aladinlite to visualize a given coverage but also to discover matching surveys or data sets the cds also provides a catalogue of mocs this service is called moc server more about moc more about moc server 468 225 biblio references simbad is a catalogue of astronomical objects referenced in astronomical articles here is the number of all bibliographic references used to update simbad more about simbad 26 135 acronyms astronomical objects are designated by object identifiers often called object names an acronym is used to build and describe an object identifier the cds publishes a catalogue of acronyms called the dictionary of nomenclature this dictionary is mostly used by simbad vizier and sesame but can also be used by anyone to get the description of the acronym used for a given object identifier more about the dictionary of nomenclature ks4 data release 1 kmtnet synoptic survey of southern sky data an ambitious observing program carried out with korea s own telescopes is made public and can be explored with aladin lite read more virtual observatory training event the astro cc project is organizing a virtual observatory training event read more open science award for aladin lite aladin lite was awarded the 2025 open science award for research open software in the community category read more authentication to access original data files the cds policy for resources access is to provide open data however in order to guarantee a high quality service some resources even if they are public require authentication original data available in the landing pages of the vizier catalogues require now a basic authorization when data are downloaded in certain format txt fits html gzipped the other access points including common vizier pages and ivoa output stay available without any authentications read more vera c rubin s first light the vera c rubin observatory just released its first images their skyviewer visualization tool uses aladin lite read more euclid q1 images explore the euclid q1 images with aladin read more vizier 3d photometry viewer a new version of the photometry viewer which displays indexed photometry for a set of catalogs at a given position or object name sed like but around a position is now available the 3d version adds a temporal aspect to the fluxes all feedback is welcome read more 20 million objects in simbad in november 2024 the number of distinct astronomical objects in simbad passed the 20 million milestone read more vphas dr4 h alpha explore this eso survey with aladin read more new hips for planet earth explore the earth elevation with this new planetary hips read more ks4 data release 1 virtual observatory training event open science award for aladin lite authentication to access original data files vera c rubin s first light euclid q1 images vizier 3d photometry viewer 20 million objects in simbad vphas dr4 h alpha new hips for planet earth news catalogs recently added in vizier new vizier version new vizier version new vizier version beta more news we will be there 3 events publishing data at cds the cds strongly relies on data published in various astronomical and astrophysical journals to update databases like simbad and vizier authors of these articles can help the cds team to get and publish their data see the data publication page to get some best practices and tools to help you accessing cds data the cds gives access to many astronomical data such as objects catalogues images and spectra several services are available to search for and to get these data here are the main services need more information you can find information about the cds and its activities in the about section various help material is available in the help section of this website specifically about how to access data tutorials services documentations and tools and api documentation are available you can also find more precise help on a specific service on its own website or on a specific tool in its github repository if any you might also find answers in the frequently asked questions page if you still need help do not hesitate to send us an email cds on the web contact legals