You need to upgrade your Flash Player The theme of this blog is not only and obviously space, but in particular “terrestrial worlds”, places that tend to have surfaces on which one could walk or at least attach oneself to. These places sometimes also have other earth-like familiar features such as atmospheres, weather, volcanos, geysers and perhaps, we are finding, even exotic oceans, rivers or lakes that are not necessarily made of familiar materials we are used to here at home. The second theme is imagery. Occasionally I do some retouching of images when needed if an image is incomplete or sometimes “dirty” or noisy. I will attempt to correct image shortcomings based upon other images or well-accepted presumed attributes. When this is done, notes will be offered as to what was added, why and sometimes how it was done. This way no one should ever wonder if something they are looking at is real or photoshop.

Archive for the 'Iapetus' Category

Iapetus September 10 - 01 (color)

Tuesday, September 11th, 2007

Iapetus from 8,593 kilometers

From yesterday’s encounter at 8,593 kilometers. Near true color image constructed from the infrared, green and ultraviolet filters.

Iapetus From 1,478 km (mono)

Monday, September 10th, 2007

Found a few more to make this b&w composite, but no ridge or border between the high and low contrast regions seen here. I would guess that the closer and full disc images would be coming in the next transmission which I read is probably in a few hours from now.

Iapetus From 1,478 km

Iapetus Images Coming In

Monday, September 10th, 2007

Emily’s Iapetus

Images are starting to appear on the Cassini raw files site. Click the above image to get the giant color hi-res composite by Emily Lackdawalla from The Planetary Society website. The famous walnut ridge is clearly visible in better detail than we have seen previously. Also visible is a clear boundary between the famous Iapetus white and dark sides beginning to appear on the right.

Closest Iapetus Flyby of Mission In 2 Days

Friday, September 7th, 2007

Iapetus from 693,941 kilometers

On Sept. 10, the Cassini spacecraft performs its closest flyby during the entire mission of the odd moon Iapetus, passing by about 1,640 kilometers. The moon is somewhat further out than most of the others, so despite the fact that Cassini has many months if not years in front of it still, the moon is too out-of-the-way to be making any additional passes. Who knows when another spacecraft will be this close again? Hope its a good look… it will have to last.

I made this “close to true color” image from the raw files using the BLU, IR1 and GRE filters. The distance seen here is approximately 694,000 kilometers.

Wallpaper: Iapetus Portrait

Saturday, November 25th, 2006

Wallpaper: Iapetus Portrait

Iapetus is a moon that is on one side one of the brightest objects and on the other one of the darkest objects. In addition to this oddity is the giant equatorial ridge that runs nearly complete around the whole of the moon. Neither of these features origins have been established, although many theories exist. One theory is that Iapetus at one time grazed the edge of Saturn’s rings which would have deposited a huge amount of material around its equator. But to do this it would have had to have been much closer to Saturn and have been ejected out past most of the larger moons to its present position. Another theory suggests that the materials might have come from another of Saturn’s moons, Pheobe, and spiraled in to be swept up by Iapetus. More theories involve internal heating and the movement of matrials from the interior to the surface through various means such as cryo-volcanism.

IMAGE NOTE: The image was originally black and white and has been colorized based upon other colored images.

Also see the wallpaper of Iapetus’s brighter side here added in September, 2007.