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How Tiny Red Stars Can Test Ideas about the Origin of Life

Ultracool dwarf stars lack the UV light thought to be needed to kick-start life

sciencenews.org/article/dwarf-

HiRISE 3D: Streamlined Features in Athabasca Valles

The rationale for this observation was elegantly simple: to extend coverage of spectacular landscape.

Full image: uahirise.org/anaglyph/ESP_0805

NASA/JPL-Caltech/UArizona

HiPOD: A Sedimentary Fan in Southeast Gale Crater

This image covers a fan of sedimentary rock on the southeast crater floor. Ridges on the fan surface may be composed of coarse-grained sediment deposited in ancient streams. More recent wind erosion of the surrounding finer sediments could have left these channel deposits elevated in “inverted relief.” A closeup shows some of these ridges, as well as light-toned layers of sediment.

uahirise.org/ESP_079699_1740
NASA/JPL-Caltech/UArizona

HiRISE 3D: A Recent Impact near Hebrus Valles

This impact occurred inside a double quasi-concentric circular graben structure. These features have been interpreted as the result of compaction of soft sediments filling a large crater basin.

Full image: uahirise.org/anaglyph/ESP_0727
NASA/JPL-Caltech/UArizona

HiPOD: Muddy Mounds

Mud volcanoes form as gas and liquid-rich sediment interacts underground. Over time, this slurry of mud is brought to the surface and forms a rounded mound. Scientists are interested in studying mud volcanoes on Mars because the material forming the mound has the potential to be organic in nature and would give insight into possible microbial life below the surface.

uahirise.org/hipod/ESP_080034_
NASA/JPL-Caltech/UArizona

HiRISE 3D: A Crater and Its Frozen Ejecta

A post in two pics: the classic bowl-shaped crater and some of the higher-standing ejecta to the immediate north.

Full image: uahirise.org/anaglyph/ESP_0806

NASA/JPL-Caltech/UArizona

HiPOD: A Three-in-One in Meridiani Planum

With this observation, we were able to get three targets of interest in a single image: good candidates for recurring slope lineae on the slopes, small gullies and the entire impact crater itself. Meridiani straddles the Martian equator and is one of the most investigated regions of Mars.

ID: ESP_074482_1795
date: 16 June 2022
altitude: 268 km

uahirise.org/hipod/ESP_074482_
NASA/JPL-Caltech/UArizona

A Fissure Vent East of Olympus Mons

This fissure is one of many in the volcanic plains east of Olympus Mons. The purpose of the image is to resolve any erupted material and overlap the adjacent HiRISE stereo pair to expand DTM coverage.

Full image: uahirise.org/anaglyph/ESP_0807

NASA/JPL-Caltech/UArizona

HiPOD: Out of Eberswalde

This observation shows us the most prominent of several channels around the margin of the basin upstream of the Eberswalde delta. With a closer look and stereo pair at some point, we can study the channel in better detail and determine valley dimensions.

ID: ESP_074470_1555
date: 16 June 2022
altitude: 258 km

uahirise.org/hipod/ESP_074470_
NASA/JPL-Caltech/UArizona

HiRISE 3D: In Ares Vallis

Our science goal is to document stratigraphic relationships between chaos blocks and adjacent geologic units.

Full image: uahirise.org/anaglyph/ESP_0807

NASA/JPL-Caltech/UArizona

HiPOD: Ridges near Nilosyrtis Mensae

The objective of this observation is to determine the nature of a group of ridges. They may be inverted terrain. The surface of Nilosyrtis Mensae is classified as fretted terrain. This terrain contains cliffs, mesas, and wide flat valleys. Surface features are believed to have been caused by debris-covered glaciers.

ID: ESP_074466_2100
date: 15 June 2022
altitude: 285 km

uahirise.org/hipod/ESP_074466_
NASA/JPL-Caltech/UArizona

HiRISE 3D: Terrain Southwest of Jezero Crater

The terrain isn’t always plain on Mars.

Full image: uahirise.org/anaglyph/ESP_0808

NASA/JPL-Caltech/UArizona

HiRISE 3D: Possible Rhythmite-Rich Terrain

The rationale notes: "To do science with rhythmite, one must map rhythmite thicknesses which requires HiRISE stereo." Indeed!

Full image: uahirise.org/anaglyph/ESP_0807

NASA/JPL-Caltech/UArizona

HiPOD: Landforms in the Northeast Syrtis Major Region

With this observation, we want to study the relationship between layered sulfates in northeast Syrtis and paleotopography: was it draping or progressive submergence of land by an advancing sea? (This is also known as “onlap.”) HiRISE resolution can help to trace layers and fit bedding orientations.

uahirise.org/hipod/ESP_074479_

NASA/JPL-Caltech/UArizona

HiPOD: Cliff Watchin’

Our science goal is to monitor seasonal frost on an icy scarp with known changes (falling rocks) and then get summer images to compare for other changes while well-lit and look at within-summer sublimation effects.

uahirise.org/hipod/ESP_074465_

NASA/JPL-Caltech/UArizona

HiPOD: Boulders in Gully Alcoves

Gullies are often found on steep slopes. In the winter, this area is covered with a layer of carbon dioxide ice (dry ice). In the spring, when the ice warms up and transitions to gas, it dislodges material on the slope, forming a gully.

In general, this process works best on fine material, leaving behind large boulders. These boulders can be seen collected in the gully alcoves.

uahirise.org/hipod/ESP_039747_
NASA/JPL-Caltech/UArizona

HiRISE 10K: Gullies in Russell Crater

Our science goal is to search for gully activity in a new zone on a major dune in Russell Crater.

Full cutout on Flickr: flic.kr/p/2piKKa3

NASA/JPL-Caltech/UArizona

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HiRISE (NASA)

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