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.

Hubble Almost Beats Voyager

Jupiter and Callisto from Hubble

The two 80’s Voyager missions to Jupiter were one of the highlights of the decade in planetary missions. There were some images from the two Voyagers that were closer in detail that we can hope to do from Earth orbit, but this image above comes close. You wouldn’t know this was not a Voyager, or even a Galileo mission image except for the fact its not. Hard to imagine that only 20 years ago we couldn’t see a single detail on Ganymede’s surface without actually sending a probe to the Jupiter system. This view from Hubble is, “so sharp that astronomers can see features on Ganymede’s surface, most notably the white impact crater, Tros, and its system of rays, bright streaks of material blasted from the crater”.

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