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.

A New Messenger at Mercury Image

Craters with Dark Halos on Mercury

The newest image released from the Messenger flyby of Mercury features two craters with dark halos surrounding them. The dark material was either generated by heat from the impact or was just below the surface and brought up by the impact. Either way, the assumption is that these are “newer” features since what ever process removed the dark halos from the rest of the craters — seemingly has not had the time needed to complete the process on these.

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