The Ring-Moon Systems Node of NASA's Planetary Data System is devoted to archiving, cataloging, and distributing scientific data sets relevant to planetary rings and moons, and the ways they interact.

Planetary Data and Support

Search for data using OPUS (Outer Planets Unified Search)

  • View the Getting Started Guide and the API Guide under the OPUS Help Menu.

  • Check out the OPUS tutorial videos.

  • Subscribe to the OPUS Users Mailing List for updates (~ every 2 to 4 weeks) on changes to OPUS.

  • Systems: Jupiter, Saturn, Uranus, Neptune, and Pluto.

  • Missions: Cassini, New Horizons, Voyager, Galileo, and HST.

  • Search Options: Surface geometry for moons, planets and rings, lighting geometry, resolution, and much more!


Browse our Data holdings using Viewmaster

  • See and preview every data set in our archive.

  • Drill down to individual products, complete with preview images, diagrams, indices, and documentation.

  • Links to download tar.gz archives of entire collections are never more than one click away.


Learn about how to use our data sets by following one of the “Missions and Data” links at left.

  • If you are unfamiliar with scientific image formats, consider taking Emily Lakdawalla’s free on-line course, Basics of Digital Imaging.

Expand Your Search if you are not finding what you need. You can use the button on the right to ask for assistance or try the PDS-Wide Search Engine.

Cassini Ring Occultations

The Cassini RSS, UVIS and VIMS occultation datasets are now version 2.

  • Combined the three datasets contain more than 1400 ring radial profiles spanning the entire Cassini mission.

  • See our Occultations page for more information and links to the data.

ROSES 2021 Proposal Support

Our Research Proposal Support pages have been updated in response to the release of ROSES 2021.

2020 - Cassini Mission Final Report, Volume 1, Mission Overview, Science Objectives and Results

See the Science Overview of our Cassini home page for links to the full Volume 1 document and extracted sections of that document relevant to the RMS Node.

Image Galleries

Explore the solar system by visiting our Image Galleries.

Help the RMS Node and PDS Serve You Better