NASA/IPAC Extragalactic Database

NED is a comprehensive database of multiwavelength data for extragalactic objects, providing a systematic, ongoing fusion of information integrated from hundreds of large sky surveys and tens of thousands of research publications. The contents and services span the entire observed spectrum from gamma rays through radio frequencies. As new observations are published, they are cross- identified or statistically associated with previous data and integrated into a unified database to simplify queries and retrieval. Seamless connectivity is also provided to data in NASA astrophysics mission archives (IRSA, HEASARC, MAST), to the astrophysics literature via ADS, and to other data centers around the world.

NED是一个包含星系天体多波段数据的综合数据库，它系统地、持续地融合了来自数百次大规模天空巡天和数万篇研究论文的信息。其内容和服务涵盖了从伽马射线到无线电波段的整个观测光谱。随着新观测数据的发布，它们将与先前数据进行交叉识别或统计关联，并整合到一个统一的数据库中，以简化查询和检索。同时，还提供了与NASA天体物理学任务档案（IRSA、HEASARC、MAST）、通过ADS的天体物理学文献以及其他全球数据中心的数据的无缝连接。