A Decade Apart, But…

Having returned to New York from the American Astronomical Society meeting in Seattle, I thought I might blog about a non-astronomical topic. But then I saw the latest image from the Mars Reconnaissance Orbiter HiRISE camera. Astronomy it is!

The above image (listed under “Topographic Map of Landing Site Region” on the aforementioned HiRISE page) shows the location of the Mars Pathfinder: the HiRISE image forms the background, while the color-coding (in addition to contour lines visible in higher-resolution images than the one above) represents the same topography as reconstructed from the stereo imagery from the Pathfinder itself. So we’re comparing two very different data sets here, collected nearly a decade apart. Normally, false-color imagery makes me wince, but I have to admit that the picture above makes good use of the technique.

You may also recall the famous panoramic image taken by the Mars Pathfinder, and the new HiRISE page offers a variation that shows the Sojourner rover at various points in its exploration of the site. The latter image has labels that match the false-color image above, so you can try to imagine the site from two very different perspectives, in much the same way that an earlier HiRISE image was coupled with Opportunity data.

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