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 September, 2008

Mimas in Ring Shadow

Sunday, September 21st, 2008

Wanderingspace’s Comet Halley #1

Friday, September 12th, 2008

The Planetary Blog today posted an animation of Comet Halley captured by Vega 1 in 1986. The low quality of the Vega images reminded me of how low quality all the mission images to Halley were for their historic encounters. There was one image I found of Halley taken by Giotto that seemed to me to be the best I had ever seen in terms of detail and captured much of the coma that envelopes the nucleus as well. Here is that original image which was found at

Comet Halley from

The odd thing about it is the rarity of its use anywhere and the site that provided it gives no other detail about it other than “Nucleus of Comet Halley. Giotto fly-by 1986”. So out of curiosity, I decided to do a google image search for “Comet Halley” and turns out that the wallpaper image created by wanderingspace that features this image comes up first!

In the interest of full disclosure, I thought I would post the original to show how it was beautified. Most of the work was really cleaning up the noise and removing artifacts. Much of that noise was in the form of posterization and happens in the coma. So that noise was largely blurred out since the coma would pretty much just be a large blur of white at any rate, but the rate of gradation was still maintained for some level of legitimacy. Color was added to the image last, but that is entirely artistic. That and the upper left corner of the coma which was extended to fill the frame are the only fictional parts of the image.

All in all… it seems to me that when you remove the artifacts, you pretty much have the final image which was used for the wallpaper image. Less manipulation and more “clean-up” which is what I try to do with all images here when needed.

Comet Halley Wallpaper

Tethys and Saturnian Rings

Wednesday, September 10th, 2008

Tethys and Saturnian Rings

Gordan’s reworking of images taken October of 2005. Strikingly gorgeous. I think we have at least one impressive dramatic color image of each of Saturn’s major moons with Saturn or its rings as backdrop at this point.

1. Mimas
2. Enceladus
3. Dione
4. Tethys (this one)
5. Rhea
6. Titan

Asteroid Steins Flyby

Saturday, September 6th, 2008

Asteroid Steins

Asteroid Steins seen from a distance of around 800 km by Rosetta. This tiny asteroid is only around 5 km at it’s largest dimension with a crater on the top right that is approximately 1.5-km in size. That is a large impact for such a tiny body, but we have seen small bodies survive such large impacts before (Phobos, moon of Mars for instance). It seems like a pretty typical asteroid thus far and joins the growing family of such bodies visited by we humans. As a matter of fact, if I didn’t know where this came from — I would have assumed it was just another tiny moonlet imaged by Cassini in orbit around Saturn.

See the flyby animation on the official ESA Rosetta site. For those keeping score… the next major encounter in our Solar System is in just about a month with another Messenger visit to Mercury.

Rosetta’s Asteroid Flyby Today

Friday, September 5th, 2008

Artists Conception of Rosetta’s Sept 08 FlybySteins, a rare E-type asteroid, is going to have company tomorrow as Rosetta swings by on its long voyage to Comet 67P/Churyumov-Gerasimenko scheduled to occur in 2014. See a quick computer simulation of tomorrow’s encounter here.

The encounter is to take place on Sept 5 with data and images to be communicated back to Earth that evening. Processing of that information is to take place on the 6th along with a press conference. Chances are, images and other information will not become public until that conference is underway as ESA still likes to roll things out the old fashioned way.