Twin Peaks - Mars Pathfinder Les deux collines au loin, distantes d'environ 2 kilomètres, ont été nommées "Twin Peaks" et sont d'un grand intérêt pour les scientifiques pour des études futures. Les zones blanches sur la colline de gauche, appelée "Ski Run" (la descente de ski), pourraient avoir été formées par des procédés hydrauliques. (c) NASA/JPL

Monster Viking Lander 2 Mosaic -- Geometrically Corrected This monster mosaic of Utopia Planitia was created from more than 20 of the highest resolution images taken by Viking Lander 2. A few holes containing the viking lander were filled by lower resolution images. This image is geometrically corrected to take into account an 8° slope of Viking Lander 2. The Viking Lander 2 site looks like a rocky desert on Earth. It is rocker than at the lander 1 site and is less hilly. There are no drifts of sand close to the lander; however, several channels measuring as large as a meter in width and up to 10 cm deep, meanders through the pictures. The smoothness of the soil suggests that the rocks sit upon a layer of hard packed sediment. (Copyright 1997 Calvin J. Hamilton) (c) NASA/JPL

Monster Viking Lander 2 Mosaic This image is the same as the above image except that it has not been geometrically corrected. One of the footpads of Viking Lander 2 is on a rock which creates about a 8° slope for the camera. The apparent looking hill in the center of the image is due to the slope of the camera. The terrain is in reality flat. (Copyright 1997 Calvin J. Hamilton) (c) NASA/JPL

Lander 1 Site Big Joe, the large rock just left of center is about 2 meters (7 feet) wide. The top of the rock is covered with red soil. The exposed portions of the rock are similar in color to basaltic rocks on Earth. This rock may be a fragment of a lava flow that was later ejected by an impact crater. The red color of the rocks and soil is due to oxidized iron in the eroded material. In some areas of this scene rocky plains tend to dominate, while a short distance away drifts of regolith have formed. (Courtesy NASA/JPL) (c) NASA/JPL

Lander 2 Site Viking Lander 2 used its sampler arm to dig these two trenches in the regolith. The shroud that protected the soil collector head during the lander's descent lies a short distance away. The lander's footpad is visible in the lower right corner of the image. The rounded rock in the center foreground is about 20 centimeters (8 inches) wide, while the angular rock farther back and to the right is about 1.5 meters (5 feet) across. The gently sloping troughs between the artificial trenches and the angular rock, which cut from the middle left to the lower right corner, are natural surface features. (Courtesy NASA/JPL) (c) NASA/JPL

View From Lander 1 The Viking Lander 1 site in Chryse Planitia is a barren desert with rocks strewn between sand dunes. The lander's footpad is visible at lower right; a trench in the foreground (just below center) was dug by the sampler arm. Patches of drift material and possibly bedrock are visible farther from the Lander. (Courtesy NASA/JPL) (c) NASA/JPL

View From Lander 2 The Viking Lander 2 site in Utopia Planitia has more and larger blocks of stone than does the Viking Lander 1 site in Chryse Planitia. The stones are probably ejecta from impact craters near the Lander 2 site. Many of the rocks are angular and are thought to be only slightly altered by the action of wind and other forms of erosion. Drifts of sand and dust are smaller and less noticeable at the Lander 2 site. The overall red coloring of the Martian terrain is due to the presence of oxidized iron in the regolith. The pink color of the sky is caused by extremely fine red dust that is suspended in Mars' thin atmosphere. (Courtesy NASA/JPL) (c) NASA/JPL

Frost at the Viking 2 Lander Viking Lander 2 is far enough north that frost deposits form on the surface during winter. This image, taken in May 1979, shows a thin, white layer of water frost, estimated to be only microns thick, covering parts of the surface. The reddish regions are soil and rock not covered by the frost. Portions of the spacecraft are visible in the right foreground. (Courtesy NASA/LPI) (c) NASA/JPL

Viking Lander 1 This is a color composite of Viking Lander images 12d089.red, 12d088.grn, and 12d087.blu. (Copyright Calvin J. Hamilton) (c) NASA/JPL

Viking Lander 1 This is a color composite of Viking Lander images 12f010.red, 12f010.grn, and 12f010.blu. (Copyright Calvin J. Hamilton) (c) NASA/JPL

Viking Lander 1 This is a color composite of Viking Lander images 12h051.red, 12h051.grn, and 12h051.blu. (Copyright Calvin J. Hamilton) (c) NASA/JPL

Viking Lander 2 This is a color composite of Viking Lander images 21a082.red, 21a082.grn, and 21a082.blu. (Copyright Calvin J. Hamilton) (c) NASA/JPL

Viking Lander 2 This is a color composite of Viking Lander images 21d049.red, 21d049.grn, and 21d049.blu. (Copyright Calvin J. Hamilton) (c) NASA/JPL