Data Portal
View astronomical data from the great observatories.

False-color image of the star Delta Cephei.

A eclipsing binary star's light curve.
These links take you to the data repositories used by professional astronomers. An advanced knowledge of astronomy is often necessary to use these archives.
- Planetary Data System
- View scientific data from NASA's planetary missions.
- JPL's HORIZONS
- Solar System data and ephemeris calculator from the JPL.
- SIMBAD
- Explore the SIMBAD database of Galactic objects.
- NASA/IPAC Extragalactic Database
- NED is a database of objects outside our Galaxy from NASA and IPAC.
- Astrophysics Data System
- Browse an archive of all the astrophysics papers that have ever been published.
- Hubble Space Telescope
- Search the archives of the Hubble Space Telescope.
- Infrared Science Archive
- IRSA is an archive of infrared and submillimeter observations.
- HEASARC
- Browse a database of high-energy observations, including extreme ultraviolet, X-ray, and gamma ray observations from HEASARC.
- Digitized Sky Survey
- The Digitized Sky Survey includes images from all parts of the sky.
