*Description*: This color composite focuses on the 26-mile-diameter (42-kilometer-diameter) Aristarchus impact crater, and employs ultraviolet- to visible-color-ratio information to accentuate differences that are potentially diagnostic of ilmenite- (i.e, titanium oxide) bearing materials as well as pyroclastic glasses. The symphony of color within the Aristarchus crater clearly shows a diversity of materials _î__Ѷ anorthosite, basalt, and olivine. The images were acquired Aug. 21, 2005. The processing was accomplished by the Hubble Space Telescope Lunar Exploration Team at NASA's Goddard Space Flight Center, Northwestern University, and the Space Telescope Science Institute. False-color images were constructed using the red channel as 502/250 nanometers; the green as 502 nanometers; and the blue as 250/658 nanometers. North is at the top in the image. Technical facts about this news release: About the Object Object Name: Moon Object Description: Earth's Satellite Distance: The Moon is 238,857 miles (384,403 kilometers) from the Earth. Dimensions: The Moon has a diameter of 2160 miles (3476 kilometers). About the Data Data Description: These HST data are from proposal 10719. NASA's HST Lunar observation team is led by Chief Scientist J. Garvin. The team includes M. Robinson (Northwestern Univ.), D. Skillman (NASA/GSFC), B. Hapke (Univ. of Pittsburgh), C. Pieters (Brown Univ.), M. Ulmer (Northwestern Univ.), J. Bell (Cornell Univ.), and J. Taylor (Univ. of Hawaii). Instrument: ACS/HRC Exposure Date(s): August 16-21, 2005 Exposure Time: 2.5 minutes Filters: F250W (250nm), F344N (344nm), F502N (502nm), F658N (658nm) About the Image Image Credit: NASA, ESA, and J. Garvin (NASA/GSFC) Release Date: October 19, 2005 Orientation: Aristarchus Plateau on the Moon [ http://imgsrc.hubblesite.org/hu/db/2005/29/images/a/formats/compass_large_web.jpg ] Hubble View of Apollo 17 Landing Region on the Moon [ http://imgsrc.hubblesite.org/hu/db/2005/29/images/g/formats/compass_large_web.jpg ] *News Release Number:*: STScI-2005-29e