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Pretty picture: five moons for Cassini

Posted by Emily Lakdawalla on 2011/08/03 09:57 CDT

Explaining how to combine the red, green and blue images from a recent Cassini image session containing five of Saturn's moons: Janus, Pandora, Enceladus, Mimas and Rhea.

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Pretty movie: Everything in the Saturn system is in motion!

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.

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Congratulations to the Dawn team on their orbit entry & pretty pictures!

Posted by Emily Lakdawalla on 2011/07/18 05:08 CDT

There's a new orbital mission on the map! As of Friday, the relatively small mass of the asteroid Vesta has finally taken hold of its new artificial satellite, Dawn.

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Vesta looks pretty battered

Posted by Emily Lakdawalla on 2011/06/23 01:53 CDT

There was a press briefing on Dawn today at NASA Headquarters, and there are new pictures! Here's what Vesta looked like as of three days ago, when Dawn was only 189,000 kilometers away.

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Cassini finally catches Helene

Posted by Emily Lakdawalla on 2011/06/20 04:41 CDT

Cassini has finally achieved gorgeous global imaging of Helene with a spectacular flyby on Saturday, in which they got Helene to pose prettily for the camera from beginning to end of the encounter. And what a wacky, wacky world Cassini has revealed Helene to be!!

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Color versions of the recent Titan & moon beauty shots

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.

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Lots of great stuff in the latest Cassini data release

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.

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365 Days of Astronomy Podcast: What's up in the second quarter of 2011

Posted by Emily Lakdawalla on 2011/04/07 11:16 CDT

Regular readers of this blog will find the content of today's 365 Days of Astronomy Podcast familiar, because it's an update on what the solar system exploration spacecraft are up to, based on my monthly "what's up" updates.

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LPSC 2011: Sponge-moon Hyperion

Posted by Mike Malaska on 2011/03/23 02:51 CDT

Saturn's moon Hyperion has a bizarre sponge-like appearance that is in dramatic contrast to other heavily cratered bodies in the solar system.

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LPSC 2011: Day 4: Ted Stryk on icy moons and The Moon

Posted by Ted Stryk on 2011/03/17 11:22 CDT

Here are Ted Stryk's notes from the sessions he attended in the afternoon of Thursday, March 10, at the 42nd Lunar and Planetary Science Conference.

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Two fine color Cassini animations: Prometheus rotating, Tethys and Dione dancing

Posted by Emily Lakdawalla on 2011/01/20 11:23 CST

Daniel Macháček has reached into the dark side of Prometheus and pulled out an incredible amount of detail where the potato-shaped moon is illuminated by Saturnshine. He produced an animation that morphs among the three sets of four-filter color images that Cassini snapped during the flyby.

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Goodies from the January 11 Rhea flyby

Posted by Emily Lakdawalla on 2011/01/12 10:44 CST

Cassini got some incredibly tricky shots during its January 11 Rhea flyby!

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Door 1 in the Planetary Society Blog 2010 advent calendar

Posted by Emily Lakdawalla on 2010/12/01 11:05 CST

December really has arrived, and that means that the year is racing to a close. Continuing last year's tradition, I'm counting the days to the New Year with an advent calendar, where each "door" opens onto a global image of a different world in the solar system.

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Pretty picture: Three moons of Saturn

Posted by Emily Lakdawalla on 2010/10/29 12:08 CDT

The Cassini Raw Images Website always offers rewards to the browser. This evening I found the raw images necessary to create this color composite, showing the hazy orange moon Titan, the mid-sized icy moon Dione, and the tiny rock Prometheus all at the same time.

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An update to the Cassini Tour Page

Posted by Emily Lakdawalla on 2010/10/27 11:24 CDT

Where's the Cassini Saturn orbiter going to be in the next week -- or hundred weeks? It's all already planned out.

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Cassini catches four little moons in motion

Posted by Emily Lakdawalla on 2010/08/05 05:06 CDT

I've posted animations from Cassini before in which there are multiple moons moving around, but this is one of the coolest such sequences I've seen yet.

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Goodies from the latest Cassini data release

Posted by Emily Lakdawalla on 2010/08/02 05:50 CDT

I've spent a pleasurable hour or so browsing over the latest release of images from Cassini to the Planetary Data System.

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Watching the birth and death of moonlets in Saturn's F ring

Posted by Emily Lakdawalla on 2010/07/22 09:09 CDT

The Saturn system is always in motion, always changing. Saturn itself is a gas giant, with swirling storms, and like the other gas giants it has a host of moons flying around, perturbing each other's motions. And then there's the rings.

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Cassini eyes Janus

Posted by Emily Lakdawalla on 2010/07/13 01:56 CDT

Four times a year, the Cassini mission releases three months' worth of data gathered from Saturn and its moons to NASA's Planetary Data System.

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Sharpest-ever images of Daphnis

Posted by Emily Lakdawalla on 2010/07/06 02:58 CDT

As promised last week, Cassini has delivered its best photos yet of the tiny moon Daphnis, the ringmoon that is responsible for carving out the skinny Keeler gap at the outer edge of Saturn's A ring.

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