HiRISE (NASA)
HiRISE is a high resolution camera onboard the Mars Reconnaissance Orbiter (NASA). We take images of the surface of Mars. Based out of UArizona in Tucson.
Joined Aug 2018
HiRISE 3D; Mesa Stratigraphy at Terby Crater
The 2-3 km sequence of stratigraphy captures a diverse range of sedimentary rock types that includes deposition across all of the three major Martian geologic eras.
https://www.uahirise.org/anaglyph/ESP_084422_1525_ESP_083921_1525_RED
NASA/JPL-Caltech/University of Arizona
#Mars #science
A Conical Pit
Also visible in Context Camera data, this observation highlights what is likely a sublimation collapse pit. The pit is about 170 meters across. Other interesting formations, caused by the expansion and contraction of subsurface ice, are also clearly visible.
ID: ESP_075397_0910
date: 27 August 2022
altitude: 246 km
https://uahirise.org/hipod/ESP_075397_0910
NASA/JPL-Caltech/University of Arizona
#Mars #science #NASA
HiRISE 3D: A Sinuous Ridge in Arabia Terra
Could this branching and sinuous ridge in Arabia Terra be an exhumed paleo-valley? Continuing with the two adjacent images would make a nice moasic and allow a detailed geological history to be reconstructed.
https://www.uahirise.org/anaglyph/ESP_083937_1895_ESP_083581_1895_RED
NASA/JPL-Caltech/University of Arizona
#Mars #science
A Layered Dark-Toned Unit in Utopia Planitia
From HiWish: “Utopia Planitia is known to bear many thermal-contraction crack polygons. We suppose that their density & type depends on the geology of the substrate that bears them. With this image, we will investigate the presence of polygons on a dark-toned layered unit, very similar to other units further north that bear polygons themselves.”
https://uahirise.org/hipod/ESP_075387_2235
NASA/JPL-Caltech/University of Arizona
#Mars #science #NASA
Transient Slope Lineae Formation in a Well-Preserved Crater
The appearance and growth of these features resemble seeping liquid water, but how they form remains unclear, and this research demonstrated that the RSL flows seen by HiRISE are likely moving granular material like sand and dust.
HiRISE 3D: From Fluvial Ridges to Flat-Lying Rock
There is an active hypothesis that most of Aeolis Dorsa is flat lying rock that has been eroded to make a deep trough and expose river strata. This image may capture that exact process - the erosion of flat lying river stratigraphy to create very steep and 3D fluvial ridges.
https://www.uahirise.org/anaglyph/ESP_084419_1730_ESP_084208_1730_RED
NASA/JPL-Caltech/University of Arizona
#Mars #science
Landslide!
This image shows a fresh (well-preserved) landslide scarp and rocky deposit off the edge of a streamlined mesa in Simud Valles, a giant outflow channel carved by ancient floods.
The stereo images can be used to measure the topography, which in turn constrains models for the strength of the mesa’s bedrock. (Image is less than 5 km across.)
ID: ESP_050033_1920
date: 30 March 2017
altitude: 280 km
https://uahirise.org/hipod/ESP_050033_1920
NASA/JPL-Caltech/University of Arizona
#Mars #science #NASA
Unlocking an Impact Crater’s Clues
The materials exposed nearest the crater have distinctive yellowish and lighter grey appearances, while more distant ejected materials range from dark brown to bright bluish in an enhanced-color view. These varied materials may have originated from different layers penetrated by the impact.
Purple Mountain’s Majesty
This image of an isolated mountain in the Southern highlands reveals a large exposure of “purplish” bedrock.
Since HiRISE color is shifted to longer wavelengths than visible color and given relative stretches, this really means that the bedrock is roughly dark in the broad red bandpass image compared to the blue-green and near-infrared bandpass images.
Well-Preserved Impact Ejecta
This image of a well-preserved unnamed elliptical crater in Terra Sabaea, is illustrative of the complexity of ejecta deposits forming as a by-product of the impact process that shapes much of the surface of Mars.
Mantled Terrain in the Southern Mid-Latitudes
This HiRISE image shows terrain typical of these mantling deposits in the Southern Hemisphere, east of Reull Vallis. The pitted texture suggests that ice is sublimating out from the deposits as the region is warmed under current lower obliquity conditions.
HiRISE 3D: A Large Gully
This 3D pic shows a large gully with an undersized apron. Why is apron so small? It may indicate ice-rich mantle.
https://www.uahirise.org/anaglyph/ESP_083213_1425_ESP_083358_1425_RED
NASA/JPL-Caltech/University of Arizona
#Mars #science
Looking for Ice
One of MRO’s ongoing campaigns is a search for new impact craters. At high latitudes, such craters often expose ice, which appears bright in HiRISE enhanced-color images. This image was targeted to look at a candidate new crater on a lobate apron. Such aprons are often ice-rich, but the crater shows no bright material that would indicate ice.
More: https://uahirise.org/hipod/ESP_044698_2245
NASA/JPL-Caltech/University of Arizona
#Mars #science #NASA
HiRISE 3D: Fluvial Erosion in Harmakhis Vallis
This image is in a corner pointing opposite of the flow, possibly creating an eddy/turbulent area. One goal is to examine for shoreline markings and erosion effects.
https://www.uahirise.org/anaglyph/ESP_075006_1410_ESP_083973_1410_RED
NASA/JPL-Caltech/University of Arizona
Fill or Mantling Material in a Crater
High resolution imagery can help determine what this material may be (e.g., ice-rich fill, dust, or other mantling unit?) and estimates of its thickness. With knowledge of its thickness, we can discern how deep the valleys and pit would be without its presence.
Diverse Deposits in Melas Chasma
This scene includes chaotic deposits with a wide range of colors. The deposits are distinctive with both unique colors and small-scale textures such as fracture patterns.
These are probably sedimentary rocks, transported and deposited in water or air. The original layers may have been jumbled in a landslide. Dark or reddish sand dunes cover some of the bedrock.
https://uahirise.org/hipod/ESP_041134_1720
NASA/JPL-Caltech/University of Arizona
#Mars #science #NASA
New Crater Blues
The blue appearance is due to the intense blast of the impact moving around dust on the surface. That dust is usually light-toned and reddish in color compared to what’s beneath it. When you remove the dust, you’re left with a dark spot that can sometimes be blue in comparison to the redder surroundings.
More: https://uahirise.org/hipod/ESP_053006_1980
NASA/JPL-Caltech/University of Arizona
Summer Sand Dunes
Mars’ permanent north polar cap is ringed by sand dunes. In the winter and spring the dunes are covered by a seasonal cap of dry ice.
Here, we see the dark dunes in the summer, bare of seasonal frost. Two classic barchan dunes march across the rugged terrain. The long dark dune is crossing transverse aeolian ridges probably formed in a previous climate regime.
https://uahirise.org/hipod/ESP_044088_2640
NASA/JPL-Caltech/University of Arizona
#Mars #science #NASA
Frosted Gully Slopes in Shadows
This image was acquired just after the northern winter solstice, when Southern Hemisphere shadows are longest. However, the fine dust in the Martian atmosphere scatters light into the shadows, and HiRISE has the sensitivity to acquire useful images within shadows.
HiRISE (NASA)
HiRISE is a high resolution camera onboard the Mars Reconnaissance Orbiter (NASA). We take images of the surface of Mars. Based out of UArizona in Tucson.
Joined Aug 2018