PIA01273: Hubble again views Saturn's Rings Edge-on

Hubble again views Saturn’s Rings Edge-on


Saturn's magnificent ring system is seen tilted edge-on -- for the second time this year -- in this NASA Hubble Space Telescope picture taken on August 10, 1995, when the planet was 895 million miles (1,440 million kilometers) away. Hubble snapped the image as Earth sped back across Saturn's ring plane to the sunlit side of the rings. Last May 22, Earth dipped below the ring plane, giving observers a brief look at the backlit side of the rings. Ring-plane crossing events occur approximately every 15 years. Earthbound observers won't have as good a view until the year 2038. Several of Saturn's icy moons are visible as tiny starlike objects in or near the ring plane. They are from left to right, Enceladus, Tethys, Dione and Mimas. "The Hubble data shows numerous faint satellites close to the bright rings, but it will take a couple of months to precisely identify them," according to Steve Larson (University of Arizona). During the May ring plane crossing, Hubble detected two, and possibly four, new moons orbiting Saturn. These new observations also provide a better view of the faint E ring, "to help determine the size of particles and whether they will pose a collision hazard to the Cassini spacecraft," said Larson. The picture was taken with Hubble's Wide Field Planetary Camera 2 in wide field mode. This image is a composite view, where a long exposure of the faint rings has been combined with a shorter exposure of Saturn's disk to bring out more detail. When viewed edge-on, the rings are so dim they almost disappear because they are very thin -- probably less than a mile thick.

Background Info:

The Wide Field/Planetary Camera 2 was developed by the Jet Propulsion Laboratory and managed by the Goddard Space Flight Center for NASA's Office of Space Science.

This image and other images and data received from the Hubble Space Telescope are posted on the World Wide Web on the Space Telescope Science Institute home page at URL http://oposite.stsci.edu/ .

Cataloging Keywords:

Name Value Additional Values
Target Saturn Dione, E Ring, Earth, Enceladus, Mimas, Saturn Rings, Sun, Tethys
System Saturn Earth
Target Type Planet Earth, Ring, Satellite, Sun
Mission Hubble Space Telescope (HST) Cassini-Huygens
Instrument Host Hubble Space Telescope (HST) Cassini Orbiter
Host Type Orbiting Telescope Orbiter
Instrument Wide Field/Planetary Camera 2 (WFPC2)
Extra Keywords Grayscale, Infrared, Visual
Acquisition Date
Release Date 1998-08-02
Date in Caption 1995-08-10
Image Credit NASA/JPL/STScI
Source photojournal.jpl.nasa.gov/catalog/PIA01273
Identifier PIA01273