Incredible ‘sideways’ look at Mercury’s limbNovember 29th, 2011 in Space & Earth / Space Exploration
A mosaic of nine oblique views from the MESSENGER spacecraft of Mercury's limb, looking towards the horizon. Click for larger, more amazing view. Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
Wow -- just wow! Heres a unique, jaw-dropping, and beautiful look at Mercury from the MESSENGER spacecraft, in a mosaic created from nine images taken by the Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS). The camera took a sideways or oblique view of Mercurys limb, looking towards the horizon, providing a distinctive look at the rough terrain, ridges, craters and scarps of the Van Eyck Formation region, adjacent to the Caloris basin. Combining the images for a larger view not only provides a you are there feel, but it provides the science team with new ways to study Mercurys geology.
Make sure you click on the image for a larger, even more amazing view. You can compare this image with a straight-down look of the same region, below.
Looking at any landscape in from different angles has a major impact on how terrain location and feature orientation is perceived, the MESSENGER science team explained in a detailed description of how this image was made. While single images that focus on one feature are wonderful for in-depth explorations, combining images together in a mosaic studying can provide regional or even global perspective. These mosaics are particularly important for understanding the geological context of a particular feature and for exploring Mercurys geologic history.
The Van Eyck region was formed by ejecta from the Caloris basin. Visible in the overhead view are ghost craters which are impact craters that were later buried by the voluminous volcanic lavas that form the plains in this part of Mercury. What appear as rough terrain and ridges in the oblique limb view show up as lineated, distinctive features from overhead. Both views provide clues to scientists about the processes or environment that the features formed.
The ejecta blanket of Caloris basin is to the lower left of the overhead-view.
The limb mosaic is just 9 of 75,000 images the NAC has taken and will continue to take during MESSENGERs primary mission, which goes through March of 2012. These images were taken in June of 2011, and the mosaic was released today by the imaging team.
Source: Universe Today
"Incredible ‘sideways’ look at Mercury’s limb." November 29th, 2011. http://phys.org/news/2011-11-incredible-sideways-mercurys-limb.html