This view of <a href="https://en.wikipedia.org/wiki/Mars" class="extiw" title="en:Mars">Mars</a>, the sharpest photo ever taken from Earth, reveals small craters and other surface markings only about a dozen miles (a few tens of kilometres) across. (The spatial scale is 5 miles, or 8 kilometres per pixel). The <a href="https://en.wikipedia.org/wiki/Advanced_Camera_for_Surveys" class="extiw" title="en:Advanced Camera for Surveys">Advanced Camera for Surveys</a> (ACS) aboard NASA/ESA <a href="https://en.wikipedia.org/wiki/Hubble_Space_Telescope" class="extiw" title="en:Hubble Space Telescope">Hubble Space Telescope</a> snapped this image on August 24 2003, just a few days before the red planet's historic "close encounter" with Earth. Retouched image to remove the ACS "Fastie finger".
NASA/ESA, J. Bell (Cornell U.), and M. Wolff (Space Science Inst.) Additional image processing and analysis support from: K. Noll and A. Lubenow (STScI); M. Hubbard (Cornell U.); R. Morris (NASA/JSC); P. James (U. Toledo); S. Lee (U. Colorado); T. Clancy, B. Whitney and G. Videen (SSI); and Y. Shkuratov (Kharkov U.)
<ul><li><a rel="nofollow" class="external free" href="http://www.spacetelescope.org/images/opo0322i/">http://www.spacetelescope.org/images/opo0322i/</a> (<a rel="nofollow" class="external text" href="http://www.spacetelescope.org/images/large/opo0322i.jpg">direct link</a>)</li>
<li><a rel="nofollow" class="external free" href="http://hubblesite.org/newscenter/archive/releases/2003/22/image/i/">http://hubblesite.org/newscenter/archive/releases/2003/22/image/i/</a></li></ul>