* Astronomy

New images for 14 May 2008

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Slope Streaks in the Olympus Mons Aureole (PSP_008144_2055) Slope streaks are features commonly found throughout the equatorial regions of Mars.	Wrinkle Ridge in Hesperia Planum (PSP_008082_1560) Features in this image have been identified on many planets, such as Venus and Mercury, as well as on the Moon.	Light-Toned Rocks Exposed inside Crater (PSP_008075_1590) Distinct materials within impact craters suggest that the crust on Mars may contain many units of variable composition.
Meridiani Region Layers and Phyllosilicates (PSP_008060_1770) Aeolian processes are active here, which are visible in dunes and ripples, most likely made of basaltic sand.	Catastrophic Flood Channel of Ares Valles (PSP_007810_1885) This image reveals unprecedented detail of an enigmatic feature on the Martian surface.	Well Preserved Impact Crater of Alba Patera (PSP_006745_2250) The mounds of material located adjacent to the walls probably fell there during the late-stages of crater formation.

New images for 30 April 2008

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Lava Flows at the Summit of Olympus Mons (PSP_007959_1980)	Lava Flows from Pavonis Mons (PSP_007840_1800)	Ejecta Blanket of an Impact Crater (PSP_007822_1415)
Defrosting Dunes in the North Polar Sand Sea (PSP_007801_2610)	Segment of a Crater Ray (PSP_007751_1640)	Exposed Layers in Crater Wall Near Mawrth Vallis (PSP_007744_2055)
North Polar Layered Deposits in Springtime (PSP_007712_2670)

New images for 23 April 2008

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Dissected Mantle Terrain and Scallops in Tempe Terra (PSP_007930_2310) Formation of scalloped depressions may be a process that is still active today.	Layered Sediments in Hellas Planitia (PSP_007820_1505) The floor of Hellas includes the lowest parts of the Martian surface, and has been proposed as the site of ancient lakes or seas.	Proposed MSL Landing Site: Eberswalde Crater (PSP_007270_1560) This image covers a portion of Eberswalde Crater which has an ancient deltaic depositional setting and is a possible site for the Mars Science Laboratory.
Proposed MSL Landing Site: Mawrth Vallis - Ellipse 4 (PSP_007243_2050) The surface of Mawrth Vallis, with its rich mineral diversity including clay minerals, is scientifically compelling for the Mars Science Laboratory.	Proposed MSL Site: Holden Crater (PSP_007191_1535) A candidate site for the Mars Science Laboratory, the rover would drive across traversable ripples where inverted channels are evidence for past water activity.	Craters Within a Crater (PSP_006726_1830) Within Schroeter Crater is another full, possibly younger crater with a sharp rim and filled with dunes.

-- Edited by Blobrana at 08:00, 2008-04-24

New images for 16 April 2008

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North Polar Dunes (PSP_007779_2570) A vast sea of basaltic sand dunes surrounds the north pole in this observation.	Disappearing Dunes (PSP_007726_2565) This image is of a location where the first significant change to sand dunes was reported on Mars.	Proposed MSL Landing Site in Mawrth Vallis - Ellipse 2 (PSP_007612_2045) Mawrth Vallis has a rich mineral diversity, including clay minerals that formed by the chemical alteration of rocks or loose regolith by water.
Proposed MSL Landing Site in Eberswalde Crater (PSP_007481_1560) The delta, meandering channels and the detection of phyllosilicates provides evidence for possible persistent aqueous activity on Mars.	Proposed MSL Landing Site in Mawrth Vallis - Ellipse 1 (PSP_007388_2050)	Large Southern Hemisphere Gully (PSP_007126_1210) Such gullies are among the most recent landforms on Mars, and were probably carved by liquid water.
Gullies in Utopia Planitia (PSP_006724_2165) Gullies are rarer in the northern hemisphere, possibly because there are fewer slopes for them on which to form.	Aeolian Playground in Smith Crater (PSP_006284_1145) The dark color of the dunes here are probably made of basaltic sand, a volcanic rock common on Mars.