MARS - MARS SOURCES Sources for Mars: McNab, David, and James Younger. The Planets. New Haven and London: Yale University Press, 1999. "Mars Fact Sheet," National Space Science Data Center. Online. 14 July 2000. http://nssdc.gsfc.nasa.gov/planetary/factsheet/marsfact.html  Kaufmann III, William J. and Roger A. Freedman. Universe, Fifth Edition. W.H. Freeman and Company: New York. 1999.  "Mars [Planet]." World Book Multimedia Encyclopedia. Chicago: World Book Inc., 1997. Vilas, Faith. The New Solar System. Ed. J. Kelly Beatty, Carolyn Collins Peterson, Andrew Chaikin. Cambridge, Massachussets: Cambridge University Press, 1999. Photo Credits for Mars: Mars: Sharpest view of Mars taken by the Hubble Telescope. Taken March 20, 1997. Credits to David Crisp and the WFPC2 Science Team. Photo #: STScI-PRC97-09. Courtesy of JPL/CalTech/NASA. http://oposite.stsci.edu/pubinfo/pr/97/09/A.html Mars Globe: (mars_globe1.jpg) Global mosaic of Mars. Visible in the center of this mosaic is the largest known chasm in the solar system, Valles Marineris. Reproduced from Volume 14 of the Mission to Mars: Viking Orbiter Images of Mars CD-ROM set. Courtesy of NASA/NSSDC http://nssdc.gsfc.nasa.gov/photo_gallery/photogallery-mars.html Surface of Mars: Viking 2 panorama of the Martian surface. http://nssdc.gsfc.nasa.gov/image/planetary/mars/vikinglander2-1.jpg Phobos: Mars' largest satellite, Phobos. Reproduced from Volume 14 of the Mission to Mars: Viking Orbiter Images of Mars CD-ROM set. NASA ID: F242A21 http://nssdc.gsfc.nasa.gov/image/planetary/mars/phobos.jpg Phobos (whole): Montage of three separate images of Phobos taken by Viking 1. http://nssdc.gsfc.nasa.gov/image/planetary/mars/f854a81-3.jpg Deimos: Mars' smallest satellite, Deimos. Reproduced from Volume 59 of the Mission to Mars: Viking Orbiter Images of Mars CD-ROM set. NASA ID: F413B83 http://nssdc.gsfc.nasa.gov/image/planetary/mars/deimos.jpg