References . . .16. Courtesy of JPL and NASA. See http://www.jpl.nasa.gov/news/news.cfm?release=2008-156a17. Courtesy of NASA, JPL and University of Arizona Lunar and Planetary Laboratory. See http://www.space.gc.ca/asc/eng/exploration/phoenix.asp 18. Courtesy of NASA, JPL - Caltech, University of Arizona, Texas A&M University. See http://jpl.nasa.gov/news/phoenix/images.php?fileID=16006 19. Courtesy of JPL and NASA. See http://www.jpl.nasa.gov/news/news.cfm?release=2008-155 20. Courtesy of NASA, JPL - Caltech, University of Arizona and Texas A&M University. See http://jpl.nasa.gov/news/phoenix/release.php?ArticleID=1862 21. Courtesy of JPL and NASA. See http://mars.jpl.nasa.gov/missions/future/futureMissions.html 22. Courtesy of NASA Goddard Space Flight Center. See http://www.nasa.gov/mission_pages/mars/news/maven_20080915.html 23. Courtesy of NASA, JPL and Malin Space Science Systems. See http://mars.jpl.nasa.gov/gallery/global/PIA02653.html 24. Courtesy of NASA, JPL-Caltech and Malin Space Science Systems. See http://www.msss.com/msss_images/2008/09/24/index.html 25. Courtesy of NASA, JPL and Malin Space Science Systems. See http://mars.jpl.nasa.gov/gallery/polaricecaps/PIA01471.html 26. Courtesy of NASA, JPL and Malin Space Science Systems. See http://mars.jpl.nasa.gov/gallery/polaricecaps/PIA03204.html 27. Courtesy of NASA, JPL and Malin Space Science Systems. See http://mars.jpl.nasa.gov/gallery/global/20020418f_g.html |
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