| Cambridge_Astronomical_Survey_Unit Contains information on the PDS and APM microdensitometer facilities, Carlsberg Meridian telescope, data archives, and processing center. |
| CATS_Database Astrophysical CATalogs support System. Contains list of catalogs, table of major radio catalogs, and search tool. |
| CFHT_Archive The Canada-France-Hawaii Telescope Archive. Includes CFHT archives, images, instruments, help, and links. |
| DARTS A database to provide access for general researchers to observation data about solar, astrophysics and terrestrial information derived by the observation satellites of ISAS. Includes related resource |
| 2dF_QSo_Redshift_Survey_(2QZ) An Anglo-Australian collaboration surveying 740 square degrees of high-galactic lattiude sky. Contains spectroscopic data release, results, progress report, and input catalogue, survey members, and pu |
| DSS_-_The_Digitized_Sky_Survey Comprises a set of all-sky photographic surveys in E, V, J, R, and N bands conducted with the Palomar, and UK Schmidt telescopes at the Space Telescope Science Institute. |
| The_ELODIE_archive Hosts more than 16000 Echelle spectra of 2000 objects from the ELODIE spectrograph at OHP observatory. |
| ESO,_and_Space_Telescope_Science_Archive_Facilities A joint venture of The European Southern Observatory(ESO), and the Space Telescope European Coordinating Facility(ST-ECF). Contains a shared archive server, services, news, updates, digitized sky imag |
| ESO/ST-ECF_USNO-A1_0_Catalogue_Server Archive provides access to the all-sky catalogue from the set of ten CD-ROMs produced by the US Naval Observatory within the Precise Measurement Machine Project. |
| A_General_Catalogue_of_Galactic_Carbon_Stars A collaborative catalogue of carbon stars by the University of Latvia's Institute of Astronomy. |
| HEASARC High Energy Astrophysics Science Archive Research Center. Provides an archive of data on (and software for analyzing) gamma-ray, X-ray, and extreme ultraviolet observations of cosmic (non-solar) sour |
| Hypercat__Extragalactic_database Search data about millions of galaxies by their name or celestial position. Also an archive of 100,000 images of galaxies. |
| Infrared_Astronomical_Satellite_(IRAS) Sky map, and point source catalogs from the all-sky survey. |
| Infrared_Space_Observatory Data archive by the European Space Agency mission with the participation of ISAS and NASA. |
| Islamic_Crescents\'_Observation_Project Global project organized by the Arab Union for Astronomy and Space Sciences (AUASS). Contains data base for Crescent Observations. |
| Jim\'s_Hubble_Telescope_Photo_Gallery Presents photos from the Hubble Space Telescope. |
| Leicester_Digitized_Sky_Survey An image browser providing access to digitized optical Schmidt plates forming the STScI Survey. |
| MAST__Multimission_Archive_at_STScI MAST supports a variety of astronomical data archives, with the primary focus on scientifically related data sets in the optical, ultraviolet, and near-infrared parts of the spectrum. |
| MBCAA_Observatory Data and graphical interpretations of observations of variable stars, gamma ray bursts, minor planets, and other transient phenomena. |
| Microsoft_Research_and_the_SDSS_SkyServer A project to develop an Internet data resource in astronomy. Includes journals, reading, the sky server, team information, and links. |
| The_Munich_Astro_Archive Archives astronomical data. Includes star dates, comets, glossary, astronomical catalogs, calendar, meteor events, and astromaps. |
| NCSA_Astronomy_Digital_Image_Library (ADIL) collects astronomical, research-quality images and make them available to the astronomical community, and the general public. Offers Library access, image browse, and FITS links. |
| The_New_UKIRT_Archive The United Kingdom Infrared Telescope Archive. Offers search tool, and operator's log. |
| NOAO_Data_Archives Operated by the Association of Universities for Research in Astronomy (AURA), Inc. Includes survey programs data archive, and links to other data collections. |
| NVSS_Postage_Stamp_Server This postage Stamp server for NRAO/VLA Sky Survey (NVSS) returns radio images of the sky in FITS or JPEG format. |
| Pat_Baker\'s_Astronomy_Central Explores astronomy, the universe, the Hubble telescope, the solar system, and astronomy history. Offers news, images, articles, and links. |
| Personal_Web_pages A list of the personal web pages of professional astronomers from around the world. Extensive. |
| Radio_Astronomy_Group,_University_of_Tasmania Contains student research projects, astronomical data, radio observatories, and history. |
| The_Royal_Astronomical_Society UK organization promoting astronomy, geophysics, and planetary science. |
| SAO_Telescope_Data_Center Creates, and maintains software to process and archive data from optical telescopes at the Oak Ridge Observatory in Harvard, Massachusetts, Whipple Observatory, and Multiple Mirror Telescope on Mt. Ho |
| SIMBAD_Astronomical_Database Offers data, cross-identifications, observational measurements, and bibliography for celestial objects outside the solar system including stars, galaxies, and nonstellar objects within our galaxy, or |
| Solar_Data_Analysis_Centre Contains solar data, and images. Includes SDAC Data-Finder, current solar images, and TRACE analysis guides. |
| Space_Telescope_Science_Institute Contains astronomy resources, space data archives, visitor information, and research opportunities. |
| Starcast Provides simultaneously queries, and many astronomical databases. Includes input target coordinates or name, data type, source, and bandpass. |
| Supercosmos_Sky_Surveys Provides images, and catalogues of the southern sky in three colours. Includes access to digitised images, and the data derived from SuperCOSMOS scans of photographic Schmidt survey plates. |
| Technical_Data_for_the_Arecibo_Airglow_and_Optical_Instrumentation Data information, and instrument documentation from the Arecibo optical facility. |
| UK_astronomical_data-center Data center that is part of the Cambridge Astronomy Survey Unit providing a selection of data from the UK's ground based telescopes. Includes archives, and catalogs. |
| The_UnOfficial_Chandra_Data_Archive_Search Provides a search tool for the Chandra X-Ray Observatory secondary data products archive. |
| USGS_Planetary_GIS_Web_Server_ Mapping interface that will integrate powerful Geographic Information Systems (GIS) graphical, statistical, and spatial relational tools for analyses of planetary datasets. |
| The_UTR-2_Catalogue Provides a low frequency sky survey of discrete sources obtained in the Institute of Radio Astronomy of the Ukrainian National Academy of Sciences. Images from the UTR-2 radio telescope at a number of |
Simbad
VizieR
Aladin
Catalogs
Dictionary
Biblio
Tutorials
DevelopersCDSsetAName('CDSitem_Aladin.logo') The Aladin Sky Atlas 
DownloadAladinon yourmachine 
StartAladinapplet (Fr - US - Jp - In - UK - Ca)* 
Jump toAladin previewer en français New: Le manuel de l'utilisateur - July 2008 The new user manual dedicated for the Aladin Beta release - in French, and soon in English... Description Aladin is an interactive software sky atlas allowing the user to visualize digitized astronomical images, superimpose entries from astronomical catalogues or databases, and interactively access related data and information from the Simbad database, the VizieR service and other archives for all known sources in the field (see available data).Created in 1999, Aladin has become a widely-used VO portal capable of addressing challenges such as locating data of interest, accessing and exploring distributed datasets, visualizing multi-wavelength data. Compliance with existing or emerging VO standards, interconnection with other visualisation or analysis tools, ability to easily compare heterogeneous data are key topics allowing Aladin to be a powerful data exploration and integration tool as well as a science enabler. The Aladin sky atlas is available in three modes: a Java Standalone application, a Java applet interface and a simple previewer. Documentation The Aladin FAQ Le manuel de l'utilisateur (2Mb) Provide my data in Aladin (help form) The Aladin science case tutorial The Aladin filter manual 
Plugins Aladin can be extended by your own java plugins. See the Aladin plugin repository. Image gallery M20 - RGB image for Trifid Nebula and catalog filter usage M20 multiviews - the same with the V3 multiview mode ACO1060 - Graphical overlay usage and side by side comparison Some figures . 1.7MB Aladin V5 package size for 170 000 code lines . 1.4 to 1.6 Java compliant . ~220 000 data base queries per month via Aladin from ~8 000 nodes. . 5.5TB magnetic disks for the Aladin image server Copyright ULP/CNRS Portions of the code (FoV advanced integration, Fits cubes, Xmatcher by ellipses, Plastic integration)) have been developed in the framework of EuroVO VOTech project (2005-2008). Portions of the code (contours, filters, metadataTree) have been developed in the framework of the Astrophysical Virtual Observatory (AVO), an EC RTD project 2002-2004 The RGB feature has been developed in the framework of the IDHAproject (ACI GRID of the French Ministere de la Recherche). Acknowledgment If the Aladin sky atlas was helpful for your research work, the following acknowledgment would be appreciated: ``This research has made use of Aladin'' or cite the following article 2000A&AS..143...33B. (*) The Aladin Java applet can be started from the CDS (Strasbourg - France), from the CFA (Harvard - USA), from the ADAC (Tokyo - Japan), from the IUCAA (Pune - India), from the UKADC (Cambridge - UK), or from the CADC (Victoria - Canada). ©ULP/CNRS Contact: 
