Tag Archives: Mars Reconnaissance Orbiter

MARCI weather report, Nov 25-Dec 2, 2018

Transient local-scale dust storms brought about dusty conditions over northern Amazonis and southern Phlegra last week. Near the end of the week, dust activity spotted over Xanthe Terra, quickly subsided and pushed a cloud of dust southward to northeast Noachis. … Continue reading

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HiRISE: Delta-like lobes in Aeolis Dorsa

Delta-like lobes in Aeolis Dorsa. Branching fluvial deposits appear similar to others at Aeolis Dorsa which have been interpreted as delta-like. With HiRISE images and elevation models we would be able to measure deposit thicknesses more accurately. Observations like these … Continue reading

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CRISM: Hydrated minerals of Cydonia Colles

In this scene we observe the knobs within the northern lowlands (Acidalia Planitia) that are Fe/Mg phyllosilicate-bearing (pink-blue) and small, patchy exposures of hydrated silica (green) surrounding the knobs. Previously, phyllosilicates have only been found within impact craters in the … Continue reading

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HiRISE: Dunes in the shapes of Ts and Vs

Dunes in the shapes of Ts and Vs. They also look like funnel shapes. Beautiful Mars series. [More at links]

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HiRISE: Crater immediately east of Biblis Patera

A crater immediately to the east of Biblis Patera. Some questions include: (a) what is the “deposit” on the west side of the crater, seeming to cover the wall/floor interface? (b) what is the floor material; did lava come up … Continue reading

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HiRISE: Active dunes in Wirtz Crater

These gorgeous dunes are likely active, with ripples on their upwind slopes and dark streaks on their downwind slopes forming and changing due to wind-driven sand motion. This motion will also keep the dune brink (the edge between the two … Continue reading

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MARCI weather report, November 19-25, 2018

Sporadic dust-lifting events continued over both hemispheres of the red planet last week. A few short-lived dust storms were observed along the north polar hood near eastern Acidalia, Alba Mons, and the Phlegra Montes. Amazonis Planitia also encountered a small … Continue reading

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HiRISE: Spring frost on a cold world

Winter on Mars comes with a blanket of carbon dioxide snow. During the spring “thaw,” this snow evaporates into the atmosphere, lingering longest in the shallow depressions such as the troughs of polygon patterned ground. Enhanced color shows the carbon … Continue reading

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HiRISE: Looking at martian salts and clays

This 3D perspective view is a composite of both HiRISE and data from CRISM, another instrument onboard MRO. This view covers a small patch of ancient Martian real estate in Terra Sirenum. CRISM collects spectral data that can be used … Continue reading

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HiRISE: Branched ridges in NE Arabia Terra

Branched ridges in northeast Arabia Terra. Could these features be inverted stream channels and a depositional (alluvial) fan? Beautiful Mars series. [More at links]

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