Tag Archives: Themis Image of the Day

THEMIS: Dust devil tracks in Argyre

THEMIS Image of the Day, January 23, 2017. Today’s VIS image shows dust devil tracks in Argyre Planitia. The dark streaks are made by dust devil activity scouring the surface and removing the lighter toned dust to reveal the darker … Continue reading

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THEMIS: Gale Crater mound’s northern side

THEMIS Image of the Day, January 20, 2017. Today’s false color image shows part of the floor of Gale Crater and the northern side of Mt. Sharp (Aeolis Mons). The blue-colored areas on the crater floor are likely dunes made … Continue reading

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THEMIS: Rugged central peaks in Hale Crater

THEMIS Image of the Day, January 19, 2017. Today’s false color image shows part of the interior of Hale Crater. The THEMIS VIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create … Continue reading

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THEMIS: Waves of dunes in Rabe Crater

THEMIS Image of the Day, January 18, 2017. Today’s false color image shows part of the sand dune field on the floor of Rabe Crater. (More on Rabe Crater here.) The THEMIS VIS camera contains 5 filters. The data from … Continue reading

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THEMIS: Coprates Chasma in false color

THEMIS Image of the Day, January 17, 2017. Today’s false color image shows part of the interior of Coprates Chasma. Coprates is one segment of the gigantic equatorial rift valley, Valles Marineris. The THEMIS VIS camera contains 5 filters. The … Continue reading

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THEMIS: Terra Sirenum dunes & gullies

THEMIS Image of the Day, January 16, 2017. Today’s VIS image is of an unnamed crater in Terra Sirenum. There are gullies dissecting part of the crater rim, and small dunes on the crater floor. More THEMIS Images of the … Continue reading

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THEMIS: Faulting & graben in Claritas Fossae

THEMIS Image of the Day, January 13, 2017. Today’s VIS image shows graben called Claritas Fossae. These are caused when the ground is pulled apart, and the land between parallel faults drops down. More THEMIS Images of the Day by … Continue reading

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THEMIS: Tectonics in Sirenum Fossae

THEMIS Image of the Day, January 12, 2017. The linear depressions in this VIS image are graben. Graben are formed from tectonic activity with large blocks of material moving downward between paired faults. The crater in the bottom half of … Continue reading

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THEMIS: Channels in Noachis Terra craters

THEMIS Image of the Day, January 11, 2017. This VIS image shows several channels in and around unnamed craters in Noachis Terra. (If the channels look more like tubes or worms, remember that the sunlight is coming from the right … Continue reading

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THEMIS: Active dunes in Noachis Terra

THEMIS Image of the Day, January 10, 2017. Today’s VIS image shows part of Noachis Terra, including several large dunes on the floor of an unnamed crater. These dunes are dark in tone, hence free of the light dust that’s … Continue reading

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THEMIS: Yardangs in Memnonia Sulci

THEMIS Image of the Day, January 9, 2017. Today’s VIS image shows some of the extensive wind etched terrain in Memnonia Sulci, located south west of Olympus Mons. The linear ridges are called yardangs and form by wind removal of … Continue reading

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THEMIS: Firsoff Crater in false color

THEMIS Image of the Day, January 6, 2017. Today’s false color image shows part of the interior deposits and floor of Firsoff Crater. The “blue worms” at the bottom of the image are sand dunes. The THEMIS VIS camera contains … Continue reading

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THEMIS: Ancient plains of Terra Sabaea

THEMIS Image of the Day, January 5, 2017. Today’s false color image shows some of the extensive plains that comprise Terra Sabaea. Note the variations in color on the plains, which likely identify different geological units. We’re seeing an ancient … Continue reading

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THEMIS: Dunes on floor of Newton Crater

THEMIS Image of the Day, January 4, 2017. Today’s false color image shows some of the floor of Newton Crater. The small dark bluish features are sand dunes. The curving lines reflect the wind patterns as they flow across the … Continue reading

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THEMIS: Faulting cuts across Gorgonum Chaos

THEMIS Image of the Day, January 3, 2017. Today’s false color image shows part of Gorgonum Chaos. The linear features are tectonic faults, called graben, that are part of Sirenum Fossae. The THEMIS VIS camera contains 5 filters. The data … Continue reading

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