Posted by Emily Lakdawalla on 2012/03/08 02:27 CST
Clearly, this is Saturn, and its rings, and if you look closer you can see a tiny circle, on top of the rings, which is Mimas, and two stars in the background. It should look weird to you that while the rings are bright, Mimas is a black dot. What is happening here? Nearly everything in this picture is lit by light that has not arrived directly from the Sun.
Posted by Emily Lakdawalla on 2012/01/09 11:23 CST
A recent view from Cassini of Saturn with its largest moon (Titan) and one of its small ringmoons, Prometheus.
Posted by Emily Lakdawalla on 2011/12/22 11:52 CST
Cassini flew close by Dione on December 12 and, as usual, the close pass provided opportunities for lots of dramatic photos, not just of Dione, but of other moons wandering by in the background.
Posted by Emily Lakdawalla on 2011/12/15 11:18 CST
A summary of a new article by Matt Tiscareno about planetary ring systems that reviews the known ring systems of the four giant planets and the prospects for ring systems yet to be discovered.
Posted by Emily Lakdawalla on 2011/10/20 12:35 CDT
Cassini has completed two very close flybys of Enceladus in less than three weeks, one of them just this morning, and the images from that encounter have already arrived on Earth.
Posted by Emily Lakdawalla on 2011/10/03 11:55 CDT
Today they turned on the scientific fire hose at the Division of Planetary Sciences / European Planetary Science Congress meeting happening here in Nantes, France. My brain already feels full and I still have four more days!
Posted by Emily Lakdawalla on 2011/09/28 12:28 CDT
Since Cassini currently orbits Saturn within the plane of Saturn's rings, it has lots of chances to catch two or more moons in the same photo. One such "mutual event" happened on September 17, featuring four moons: Titan, Dione, Pan, and Pandora.
Posted by Emily Lakdawalla on 2011/07/26 06:28 CDT
A few weeks ago a producer for a public television space documentary asked me if I knew of any cool Cassini animations and my answer was, "Ooh, what a great excuse to have some fun digging around in the Cassini data archives." Here is the most fun animation I came up with in response to the request.
Posted by Emily Lakdawalla on 2011/06/02 01:46 CDT
Last week I got very excited about a set of pictures that had appeared on Cassini's raw images website, but was sad that I couldn't make color versions myself. I was so excited that I failed to identify the little icy moon in the picture correctly.
Posted by Emily Lakdawalla on 2011/04/13 04:56 CDT
I've got some lovely pictures from Saturn to show you! Every three months, the Cassini mission dumps gigabytes worth of precious Saturn data into the Planetary Data System, and the latest gift came on April 1. This particular pile of data, which was taken between April 1 and June 30, 2010, contains a lot of really terrific moon observations.
Posted by Emily Lakdawalla on 2011/02/07 04:35 CST
There is a huge storm that's spreading across so much of Saturn that it's been readily visible even from Earth-based telescopes. Over the past couple of days a couple of new images of Saturn have appeared that show just how enormous the storm is today.
Posted by Emily Lakdawalla on 2010/10/25 11:18 CDT
An awful lot of the talks in the Pluto session on Tuesday morning, October 5, at the Division of Planetary Sciences meeting spent more time focusing on how bad weather conditions were during the astronomers' attempts to view Pluto as it occulted background stars than they did on any measurements or science that came out from the data.
Posted by Emily Lakdawalla on 2010/05/12 02:30 CDT
A good start to my day today: The New York Times' Lens Blog featured the "Martian Moment in Time" photo that Opportunity took last week in a really nice writeup. I'm so grateful, and still a little surprised, that the folks on the Mars Exploration Rover mission took this idea and ran with it!
Posted by Emily Lakdawalla on 2010/01/13 03:43 CST
The January 1, 2010 Cassini imaging data release includes everything acquired by Cassini from January 1 to March 30, 2009 in all its high-quality glory.
Posted by John Smith on 2009/06/07 12:01 CDT
Each Titan flyby is not a fork in the road, but rather a Los Angeles style cloverleaf in terms of the dizzying number of possible destinations. So how did our current and future plans for the path of the Cassini spacecraft come to be? That's the question Dave Seal put to me since that's my job -- I am a tour designer.
Posted by David Seal on 2009/06/04 06:31 CDT
Saturn is rapidly approaching equinox, where the Sun passes through the ring plane (south-to-north, i.e. the northern vernal equinox), and its ring system (i.e. its great now-gloomy poorly-lit circles of large blocks of water ice) is starting to show some really interesting behavior.