<i>Original Caption Released with Image:</i> About 50,000 <a href="https://en.wikipedia.org/wiki/Clementine_(spacecraft)" class="extiw" title="en:Clementine (spacecraft)">Clementine</a> images were processed to produce the four orthographic views of the <a href="https://en.wikipedia.org/wiki/Moon" class="extiw" title="en:Moon">Moon</a>. Images <a href="//commons.wikimedia.org/wiki/File:Moon_PIA00302.jpg" title="File:Moon PIA00302.jpg">PIA00302</a>, <a href="//commons.wikimedia.org/wiki/File:Moon_PIA00303.jpg" title="File:Moon PIA00303.jpg">PIA00303</a>, <a class="mw-selflink selflink">PIA00304</a>, and <a href="//commons.wikimedia.org/wiki/File:Moon_PIA00305.jpg" title="File:Moon PIA00305.jpg">PIA00305</a> show <a href="https://en.wikipedia.org/wiki/albedo" class="extiw" title="en:albedo">albedo</a> variations (normalized brightness or reflectivity) of the surface at a wavelength of 750 nm (just longward of visible red). The image projection is centered at 0 degree latitude and 180 degrees longitude. <a href="https://en.wikipedia.org/wiki/Mare_Moscoviense" class="extiw" title="en:Mare Moscoviense">Mare Moscoviense</a> (dark <a href="https://en.wikipedia.org/wiki/albedo_feature" class="extiw" title="en:albedo feature">albedo feature</a> upper left of image center) and <a href="https://en.wikipedia.org/wiki/South_Pole-Aitken_Basin" class="extiw" title="en:South Pole-Aitken Basin">South Pole-Aitken Basin</a> (dark feature at bottom) represent <a href="https://en.wikipedia.org/wiki/lunar_mare" class="extiw" title="en:lunar mare">maria</a> regions largely absent on the <a href="https://en.wikipedia.org/wiki/Far_side_of_the_Moon" class="extiw" title="en:Far side of the Moon">lunar farside</a>. The Clementine altimeter showed Aitken Basin to consist of a topographic rim about 2500 km in diameter, an inner shelf ranging from 400 to 600 km in width, and an irregular depressed floor about 12 km in depth.
NASA
<ul><li><a rel="nofollow" class="external free" href="http://photojournal.jpl.nasa.gov/catalog/PIA00304">http://photojournal.jpl.nasa.gov/catalog/PIA00304</a></li>
<li><a rel="nofollow" class="external free" href="http://photojournal.jpl.nasa.gov/jpeg/PIA00304.jpg">http://photojournal.jpl.nasa.gov/jpeg/PIA00304.jpg</a></li></ul>