Explore detailed optical and infrared maps of the extragalactic sky, access survey data, and discover astronomical resources from the DESI Legacy Surveys.
View and download deep-sky astronomical survey data
Legacy Survey is your gateway to exploring the extragalactic sky, offering access to extensive optical and infrared maps produced by the DESI Legacy Surveys team. Whether you're an astronomy enthusiast, researcher, or student, you can browse, visualize, and download high-quality survey data covering thousands of square degrees of the northern sky.
The site provides a variety of resources, including detailed catalogs, data releases, and external links to related astronomical datasets. You can keep up with the latest updates, access bitmasks and known issues, and tap into additional data such as DESI spectra. Legacy Survey is designed to make complex astronomical information accessible and usable, supporting your curiosity or research in the universe beyond our galaxy.
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