* Astronomy

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Mars Reconnaissance orbiter

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HiRISE Images 11 February 2009

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New images for 11 February 2009

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Large Fresh Crater Near Marte Vallis (PSP_005917_2020)
This observation is cited in a February 2009 paper, "Discovery of Columnar Jointing on Mars."

Meander and Tributary of Scamander Vallis (ESP_011289_1950)
Scamander Vallis is a winding, degraded valley network in the northern hemisphere of Mars.

Crater in Meridiani Planum with Layering (ESP_011277_1825)
This image shows layered sedimentary rocks and ripples that fill and surround an impact crater in Meridiani Planum.

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New images for 04 February 2009

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Bolide Breakup and Impact (ESP_011618_1885)
Although small Martian crater clusters are common, this example is unusual because there is a dark line between the two largest craters.

Terrain in Eberswalde Crater (ESP_011331_1560)
This image was targeted in the landing ellipse as a possible site for the 2011 Mars Science Laboratory mission.

Layering at Ganges Chasma (ESP_011292_1720)
Ganges Chasma is one of several deep troughs that make up the Valles Marineris system on Mars.

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New images for 21 January 2009

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Flat-Topped Sinuous Ridge Contacting Pedestal Crater (PSP_010829_1880) This image shows part of a pedestal crater overlying a flat-topped ridge several degrees north of the Martian equator.	Southern Margin of Cerberus Palus (PSP_010744_1840) This image shows the southern edge of a large basin called Cerberus Palus, located in Elysium Planitia near Mars' equator.	Equator-Facing Slope with Gullies (PSP_010679_2205) The dark material on the crater floor is dust; some if it has been moved by dust devils to form the dark streaks visible here.
Shield Volcano with Leveed Channels in Noctis Fossae (PSP_010661_1780) The Tharsis region is located on the Martian equator and contains some of the solar systems largest volcanoes.	Valley in Ismenius Lacus Region (PSP_010656_2170) The terrain surrounding the valley has craters of a range of ages.

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HiRISE Images 21 January 2009

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New images for 21 January 2009

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Zigzag Channels (PSP_010749_1325) A large dune field, still partially covered with seasonal carbon dioxide frost, shows evidence of movement of dune material.	Angular Unconformity in Cerberus Fossae (PSP_010638_1890) The Cerberus Fossae were the source of the youngest major volcanic eruption on Mars that covered much of the surrounding area in lava.	Fresh Small Impact Crater (PSP_010624_2045) Although this crater is quite young, it is not completely pristine, as it has been partially filled by dust.
Layered Deposits North of Hellas Basin (PSP_010589_1510) Hellas is a massive impact crater, formed early in the history of Mars. It has a complex history that may have included episodic lakes and seas.	Small Shield Volcano in East Tharsis region (PSP_010569_1720) The Tharsis region is located on the Martian equator and contains some of the solar systems largest volcanoes.

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HiRISE Images 14 January 2009

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New captioned images from HiRISE, the high resolution camera onboard the Mars Reconnaissance Orbiter of the Red Planet.

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New images for 14 January 2009

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Gullies Incising a Crater Wall (PSP_010567_2360) The gullies in this image source from a similar distance from the crater rim and terminate down the slope in relatively bright deposits.	Sand Slide (PSP_010546_2615) The material may have been loosened by the activity associated with sublimation (evaporation from a solid to a gas) of seasonal frost.	Strange Surfaces in Nilosyrtis Region (PSP_010536_2190) In this region, the boundary is actually a broad region of hills, knobs and mesas, with strange and exotic textures observed on the surface.
Raised Curvilinear Ridges in Aeolis Mensae (PSP_010533_1755) Aeolis Mensae is well-known for its unusual features commonly related to wind activity on the planets surface.	Cratered Dunes and Yardangs in the Medusae Fossae Formation (PSP_010453_1675) This image shows cratered dunes and yardangs in the Medusae Fossae Formation, located in the Martian mid-latitudes and is characterised by wind-sculpted landforms.

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New images for 7 January 2009

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Flow Present Near the Central Peak of Moreux Crater (PSP_010695_2225) This image focuses on a portion of the Moreux central peak that apparently broke off and slid away, forming a type of giant landslide.	Sapping Channel Originating from a Fissure (PSP_010689_2025) This image of a region east of Tooting Crater is centered on a tectonic fissure west of the Olympus Mons Aureole.	Braided Channels West of Hecates Tholus (PSP_010678_2135) Hecates Tholus, a volcano, is located in the northern hemisphere of Mars and is the northernmost of three volcanoes within Elysium Planitia.
Gullies on the Dunes of Russell Crater (PSP_010446_1255) This HiRISE image was taken during the southern hemispheres deep winter, where temperatures are low enough to allow the carbon dioxide frost to be stable.	Fan at Valley Mouth (PSP_010434_1575) This image shows the intersection of a valley with the floor of a large impact crater.