![Image](http://nssdc.gsfc.nasa.gov/imgcat/midres/vo1_357a64.gif)
![Image](http://www.esa.int/images/114-051004-0756-6-nd-01-Phobos_L.jpg)
Mars' moon Phobos and Stickney crater from 1600 km, 1977-06-10
Martian moon Phobos in detail, less than 200 kilometres, 11 November 2004
Anyone with a photo stacker program that could combine these two great images into 1 full moon view?FieryIce wrote:A Viking 1 image along side a more recent ESA's Mars Express image.
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Mars' moon Phobos and Stickney crater from 1600 km, 1977-06-10
Martian moon Phobos in detail, less than 200 kilometres, 11 November 2004
The grooves are crater chains. The ESA proved the crater chains on the leading edge of Phobos does not show the leading edge crater chains to be larger than the trailing edge crater chains so their theory that Phobos flew through Mars debris or flew through ejecta debris is not valid or was not validated, so Phobos's crater chains are not the result of ejecta from Stickney crater or flying through debris.What causes the grooving? and no impactors =(