THEMIS: Terra Sabaea crater in false color

Terra Sabaea crater in false color (THEMIS_IOTD_20180918)THEMIS Image of the Day, September 18, 2018. Part of a large crater fills the center of this VIS image. In this false color image the dark blue material is basaltic sand. The sands are located between the crater rim and a large mound of material on the floor of the crater.

The THEMIS VIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. These false color images may reveal subtle variations of the surface not easily identified in a single band image.

See more THEMIS Images of the Day by geological subject.

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HiRISE: Sand sea monitoring

tumblr_pf2h5bBj5z1rlz4gso2_1280Sand sea monitoring. This ocean of dunes is located within central Juventae Chasma.

Beautiful Mars series. [More at links]

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Curiosity update: Who’d have thought that Ridge rocks could be so hard

CR0_590135105PRC_F0722464CCAM01170L1Sols 2172-74, September 17, 2018, update by MSL scientist Vivian Sun: Last night we learned that our drill attempt on “Inverness” was not successful, reaching only 4 mm into the rock. Today’s tactical team bounced back from this news and quickly assembled a plan to move on. This proved to be a busy day for the whole team, including me as the Geology Keeper of the Plan!

Our first order of business was discussing where to drive next. The grey Jura member is a top priority for sampling and understanding the geologic history of the Vera Rubin Ridge, so we felt it was imperative to try again. We ultimately decided to return to the “Lake Orcadie” region, where we previously attempted to drill on Sol 1977. In the past attempt, we were able to reach 10 mm depth using rotary only, so we are hopeful that this next attempt will reach sampling depths with the new percussion-enhanced drill capabilities…. [More at link]

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Trace Gas Orbiter: Frosty crater on Mars

Frosty_crater_on_MarsThis image shows the south-facing rim of a pit crater at 68°S in the Sisyphi Planum region of Mars. It is a colour composite made from images acquired on 2 September 2018 by the Colour and Stereo Surface Imaging System, CaSSIS, onboard the joint ESA-Roscosmos ExoMars Trace Gas Orbiter, when the southern hemisphere of Mars was in late spring.

Most striking are the bright residual carbon dioxide ice deposits on south-facing slopes of the crater. In colder months carbon dioxide and some water vapour freezes on the surface. Then, as the Sun gets higher in the sky again, the ice sublimates away, revealing the underlying surface.

This particular crater is known to have active gullies – small, incised networks of narrow channels at the rim of the crater that are associated with debris flows. Ice-rich landslide-like flows of material down-slope can be seen in this image – perhaps related to the ‘defrosting’ of the ice as the seasons change….  [More at link]

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Curiosity: Shallow drill pit at Inverness

2172-mahliSol 2172, September 15, 2018. The rover’s MAHLI camera recorded the results of the drill’s action at the Inverness target — a shallow pit rather than a hole. Click image to enlarge it.

Sol 2172 raw images (from all cameras).

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HiRISE: Stratified deposits in Crommelin Crater

tumblr_pf0m6pruXr1rlz4gso2_1280Stratified deposits in Crommelin Crater. This target contains light-toned deposits, a key area to investigate the geometrical and geological relationship between the central bulge and the partially sediment-covered crater floor. Also: swirls!

Beautiful Mars series. [More at links]

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THEMIS: Lunae Mensa in Kasei Valles

Kasei Valles in false color (THEMIS_IOTD_20180917)THEMIS Image of the Day, September 17, 2018. Today’s image shows a portion of Kasei Valles. The plateau in the center of the image is called Lunae Mensa.

The THEMIS VIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. These false color images may reveal subtle variations of the surface not easily identified in a single band image.

See more THEMIS Images of the Day by geological subject.

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HiRISE: Channels and ripples along crater walls

tumblr_pez5wjRLoW1rlz4gso2_1280Channels and ripples along crater walls. From the science rationale: “We would like a HiRISE image of the selected area to look for evidence of both fluvial and aeolian processes on the crater wall. Specifically, we are looking for channels that would be evident of erosion. It would be useful to know how widespread fluvial processes are across the surface of Mars and the timescale on which these processes take place.”

Beautiful Mars series. [More at links]

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Weather update from Gale Crater

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THEMIS: Basaltic sand amid hills in Terra Sabaea

Hills of Terra Sabaea (THEMIS_IOTD_20180914)THEMIS Image of the Day, September 14, 2018. Today’s VIS image shows part of northern Terra Sabaea, where hills are common. The blue tones are usually locations of basaltic sand.

The THEMIS VIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. These false color images may reveal subtle variations of the surface not easily identified in a single band image.

See more THEMIS Images of the Day by geological subject.

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