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Most recent is first
Rings after Equinox - SETI Talk: YouTube video (1 hour 4
Larry Esposito gave a weekly colloquium talk at the SETI Institute in Mountain
View, CA on March 14, 2012. Saturn's Equinox 2009: Oblique lighting exposed vertical
structure and embedded objects. The rings were the coldest ever. Dr. Esposito
will show how images inspired new occultation and spectral analysis that show
abundant structure in the perturbed regions. The rings are more variable and
complex than we had expected prior to this seasonal viewing geometry.
Spinning Northern Lights: Video.
UVIS obtained 26 images of
Saturn's auroras on May 25, 2007 over an 8 hour 15 minute period,
most of a planetary rotation period. They are presented here as
side-by-side animations of simultaneous observations from two UVIS
channels, the Extreme Ultraviolet (EUV) and the Far Ultraviolet
(FUV). They show Saturn's northern auroral lights, created by electrons
from Saturn's magnetosphere striking hydrogen gas in the atmosphere.
The EUV channel (left) shows primarily the auroral emissions. The
FUV channel (right) also shows sunlight scattered by atmospheric
gas creating a "bright
the sunlit left side. The auroral lights mostly take the form of
an oval, although variable spots of emission are seen inside the
oval. The animations show auroral brightness features rotating
as the planet and its magnetosphere rotate. The auroral arc splits
into two arcs on the night side. One of Saturn’s moons appears
briefly at the upper left near the end of the FUV channel movie.
These images were processed by UVIS Co-Investigator Wayne Pryor,
a Professor at Central Arizona College.
Occultation of Orionis behind Enceladus Plume: Animation.
structure, density and composition measurements of Enceladus'
water plume were obtained when the Cassini spacecraft's Ultraviolet
Imaging Spectrograph observed the star zeta Orionis pass behind
the plume Oct. 24, 2007, as seen in this animation. Changes in
the starlight as it dimmed while passing through the plume allowed
the spectrograph to identify the plume's physical and chemical
composition. The spectrograph detected four high-density gas
streams composed of water vapor. The density of the water vapor
is twice that of the broad plume of gas that surrounds each jet.
This measurement confirms the theoretical analysis performed
prior to the flyby that showed it was safe for Cassini to fly
very closely past Enceladus, even through part of the plume,
during the March 12, 2008 flyby. Credit: NASA/JPL/University
(On the "CU-Boulder in Space" page, click
on the Podcast tab in the box on the right. Then choose Saturn's
A story about how Saturn's Rings may last
forever, with various images narrated and set to music. Or click
here for shortcut.
Rings May Be Old As Solar System, According To New Cassini Oservations" Podcast.
CU-Boulder's Larry Esposito discusses the observations by NASA's Cassini
spacecraft which indicate the rings of Saturn, once thought to have formed
during the age of the dinosaurs, instead may have been created roughly 4.5
billion years ago when the solar system was still under construction.
as seen from Cassini Movie Animation.
On approach for orbit insertion
on June 30 MST, 2004 (July 1, UTC)