"The SIMBAD astronomical database provides basic data, cross-identifications, and bibliography for astronomical objects outside the solar system." Created by the Centre de Donn'es astronomiques de Strasbourg (CDS) in France, the website contains over three million objects, eight and a half million identifiers, one hundred thousand bibliographical references, and four million citations of objects in papers. The data can be searched by object name, coordinates, filters, and by a list of objects. Researchers can find help by visiting the user's guide and the regularly updated Dictionary of Nomenclature of Celestial Objects.