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Bob King was a respected member of the HiRISE team, who passed away in 2022. We are privilged to share of one his many accomplishments in appreciation of his memory.

Thank you, Bob.

lpl.arizona.edu/about/memoriam

HiPOD: Pits near Medusae Sulci

This image shows numerous C-shaped depressions within the Medusae Fossae Formation, which is interpreted to consist of volcanic ash. The center of most depressions contains a small hill, which provides a vital clue to how the depressions formed.

More: uahirise.org/hipod/ESP_080844_

NASA/JPL-Caltech/UArizona

HiPOD: The Oldest Sedimentary Rocks on Mars

Some of the very oldest sedimentary rocks on Mars, perhaps the best places to search for signs of ancient life, may be exposed in the deeply eroded rim of the giant Hellas impact basin. The study of such geologic strata may inform the early evolution not only of Mars, but also Earth, where such ancient rocks are poorly preserved.

More: uahirise.org/hipod/ESP_049832_

NASA/JPL-Caltech/UArizona

HiPOD: Polar Protodunes Emerge

In Western Olympia Undae, a region along the high polar latitudes of Mars, young windblown systems are emerging beneath the cliffs of the North Polar layered deposit. Persistent downslope winds, coupled with an ample supply of sand, create ideal conditions for the development of new bedforms near their sand source.

More: uahirise.org/hipod/ESP_053270_
NASA/JPL-Caltech/UArizona

HiPOD: Possible Smectite-Rich Terrain North of Her Desher Vallis

Coverage by the CRISM instrument (also on MRO) of this region of interest hints at a possible outcropping of smectite, which is a clay mineral. This composition is not yet seen elsewhere in the stratigraphy of the area. Color and multispectral analysis will also help us to investigate this geological unit.

uahirise.org/hipod/ESP_074787_
NASA/JPL-Caltech/UArizona

Hubble Reveals Possible Water-Vapor World

New Hubble Space Telescope observations reveal the warm sub-Neptune GJ 9827d might have a steamy atmosphere.

skyandtelescope.org/astronomy-

Bacteria that Can Make Humans Sick Could Survive on Mars

Future interplanetary explorers beware: Hitchhiking bacteria brought to Mars on human bodies might not only survive the harsh conditions on the Red Planet’s surface but also potentially thrive.

sciencenews.org/article/microb

HiPOD: Ridge and Channel

The objective of this observation is to determine the nature of a ridge and channel. The ridge here is narrow and straight, and the channel has straight and curved portions. These features are common in this region. This scene is also available in Context Camera data.

uahirise.org/hipod/ESP_074773_
NASA/JPL-Caltech/UArizona

HiPOD: Layers in the Walls of Nilokeras Fossa

The objective of this observation is to examine layers exposed in the wall of a trough. This image is probably the best view of layers also covered in a Context Camera image. Nilokeras Fossa is located on the margin of Kasei Valles. “Nilokeras” is Greek for “horn of the Nile.”

ID: ESP_074774_2050
date: 9 July 2022
altitude: 286 km

uahirise.org/hipod/ESP_074774_
NASA/JPL-Caltech/UArizona

HiPOD: Light Toned Deposits in Arsinoes Chaos

The objective of this observation is to examine a light-toned deposit in a region of chaotic terrain. The deposit displays a rough surface, in contrast to the smoothness of the surrounding area. Some parts of the surface appear as if they were eroded by a fluid flowing north and south. This deposit may have formed in an ancient lake.

uahirise.org/hipod/ESP_074773_
NASA/JPL-Caltech/UArizona

HiPOD Italiano: La storia di due crateri

I due crateri visibili in questa immagine di dettaglio hanno dimensioni simili, ma un aspetto molto diverso. Questo perché le loro rispettive età sono molto diverse. Quale cratere è il più vecchio?

uahirise.org/hipod/it/ESP_0137
NASA/JPL-Caltech/UArizona
Marte

HiPOD: Dust and Frost

Sand dunes in the North Polar regions of Mars show light coatings of pale orange dust blown partially across the dark basaltic sand. Around the edges of the dunes, patches of seasonal dry ice remain.

These patches will be gone soon as they sublimate (turn from ice to gas) in the summer sun. Some blocks of ice are visible at the foot of an alcove formed by a sand avalanche down the slipface of the dune.

uahirise.org/hipod/ESP_053129_
NASA/JPL-Caltech/UArizona

HiRISE 3D: Hypnosis through Polar Layers

This is a gorgeous one! Changig the layer orientation of this observation help a digital terrain model to contain dips and strikes.

Full image: uahirise.org/anaglyph/PSP_0018
NASA/JPL-Caltech/UArizona

HiPOD: Layers, Layers, Layers!

Unlike “Marsha, Marsha, Marsha!” or “Developers, developers, developers!”, this is something to *really* get excited about! Our objective is to examine these bright-toned layers in a crater wall, and see how far they extend. This crater is located within a much larger crater that might have at one time been a lake. The scene is also available in Context Camera data.

uahirise.org/hipod/ESP_074771_
NASA/JPL-Caltech/UArizona

HiRISE 3D: Alluvial Fan in an Equatorial Crater

The ridges on these fans are inferred to be the preserved remains of the fluvial channels responsible for fan formation.

Full image: uahirise.org/anaglyph/ESP_0405

NASA/JPL-Caltech/UArizona

HiPOD: Snaking across in Deuteronilus Mensae

This location show ridges emanating from a lobate debris apron. High resolution and stereo images allows to study the morphology and topography of such ridges, allowing us to see if they are consistent with an ice flow origin.

ID: ESP_079650_2225
date: 24 July 2023
altitude: 300 km

uahirise.org/hipod/ESP_079650_
NASA/JPL-Caltech/UArizona

HiRISE 3D: Comparing Layers

Compare layer sequence with higher latitude scarps to match layers and retrieve internal structure. For those of us of a certain age, these layers might resemble the edge of the VGER cloud in "Star Trek: The Motion Picture."

Full image: uahirise.org/anaglyph/PSP_0038
NASA/JPL-Caltech/UArizona

HiPOD: Preserved Meanders in a Jezero Crater Outlet

This scene is just west of an existing, spectacular HiRISE stereo pair. This location has incredibly well-preserved meander segments whose topography are critical for understanding the Jezero outlet paleohydrology. The scene is also visible in a Context Camera observation.

ID: ESP_079701_1990
date: 28 July 2023
altitude: 281 km

uahirise.org/hipod/ESP_079701_
NASA/JPL-Caltech/UArizona

HiRISE 3D: Bountiful Layers and Ridges

This scene was acquired to help distinguish between folding and topographic expression of layering in these deposits in the South Polar region of Mars.

Full image: uahirise.org/anaglyph/PSP_0050
NASA/JPL-Caltech/UArizona

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HiRISE (NASA)

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