Saturn's Double Light Show
Saturn's Double Light Show
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Fast Facts
News release ID: STScI-2010-09
Release Date: Feb 15, 2010
Image Use: Copyright
About this image

In January and March 2009, astronomers using NASA's Hubble Space Telescope took advantage of a rare opportunity to record Saturn when its rings were edge-on, resulting in a unique movie featuring the nearly symmetrical light show at both of the giant planet's poles. It takes Saturn almost thirty years to orbit the Sun, with the opportunity to image both of its poles occurring only twice during that time.

The light shows, called aurorae, are produced when electrically charged particles race along the planet's magnetic field and into the upper atmosphere where they excite atmospheric gases, causing them to glow. Saturn's aurorae resemble the same phenomena that take place at the Earth's poles.

The 2009 Hubble Advanced Camera for Surveys observations have allowed astronomers to monitor the behavior of Saturn's poles in the same shot over a sustained period of time and to analyze the planet's northern and southern lights simultaneously. The northern auroral oval appears to be slightly smaller and more intense than the southern one, implying that Saturn's magnetic field is not equally distributed across the planet; it is slightly uneven and stronger in the north than the south.

For additional information, contact:

Colleen Sharkey
Hubble/ESA, Garching, Germany
011-49-89-3200-6306
csharkey@eso.org

Jonathan Nichols
University of Leicester, Leicester, United Kingdom
011-44-116-252-5049
jdn@ion.le.ac.uk

Cheryl Gundy
Space Telescope Science Institute, Baltimore, Md.
410-338-4707
gundy@stsci.edu


Tags
Astronomical, Hubble Telescope, Planetary Atmospheres/Weather, Planets, Saturn, Solar System

Credits

Credit: NASA, ESA, and Jonathan Nichols (University of Leicester)