Data Discovery Tool

Retrieve astronomical data about a given position or object in the sky.

(version 1.7)

Find datasets from thousands of astronomical collections known to the VO and over wide areas of the sky. This includes today’s the most important collections from archives around the world such as:

  • Chandra X-ray Observatory
  • Hubble Space Telescope (HST) and other collections from the Multimission Archive at STScI (MAST)
  • Multi-band collections from NASA HEASARC
  • Sloan Digital Sky Survey (SDSS)
  • Spitzer Space Telescope
  • Two Micron All Sky Survey (2MASS)
  • CDS Vizier Catalogs
  • plus many more …


  • Search by object name or position
  • Full searching of all known image and catalog collections
  • Filter data based on data type, publisher, waveband
  • Download images or selected catalog records

Help & Documentation