Tag Archives: impacts

HiRISE: Aging with impacts

Posted on May 1, 2017 by rburnham

Mamers Valles is a long (approximately 1000 kilometers) sinuous canyon beginning in Arabia Terra and ending in the Northern lowlands of Deuteronilus Mensae. This image features the southern facing slope of the canyon wall. The northern half (top) has a … Continue reading →

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THEMIS: Aonia Terra crater ejecta in false color

Posted on April 26, 2017 by rburnham

THEMIS Image of the Day, April 26, 2017. Today’s false color image shows several small craters in Aonia Terra. The false colors help show differences in the patterns of debris ejected in the impacts. The THEMIS VIS camera contains 5 … Continue reading →

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Mars’ big-impact history had a post-accretion lull

Posted on April 25, 2017 by rburnham

From the earliest days of our solar system’s history, collisions between astronomical objects have shaped the planets and changed the course of their evolution. Studying the early bombardment history of Mars, scientists at Southwest Research Institute (SwRI) and the University … Continue reading →

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HRSC: Crater triplets

Posted on April 6, 2017 by rburnham

At first glance this scene may seem nothing out of the ordinary, but the large elongated crater marks the imprint of an impacting body that may have broken into three before it hit Mars. The images were acquired by ESA’s … Continue reading →

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HiRISE: New impact site in southern mid-latitudes

Posted on April 5, 2017 by rburnham

Over 500 new impact events have been detected from before-and-after images, mostly from MRO’s Context Camera, with a HiRISE followup. Those new craters that expose shallow ice are of special interest, especially at latitudes where not previously detected, to better … Continue reading →

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HiRISE: Is that an impact crater?

Posted on April 3, 2017 by rburnham

This image was acquired to take a closer look at a circular feature that might be an impact structure on the South Polar layered deposits. Measuring the sizes and frequency of impact craters provides a constraint on the age of … Continue reading →

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Opportunity: Geologically fresh crater

Posted on March 27, 2017 by rburnham

Sol 4680, March 24, 2017. A relatively fresh crater from a small meteorite impact lies out on the sands of Meridiani, just west of the Endeavour Crater rim. (False color Pancam  reconstruction by Holger Isenberg.) For a larger version, click … Continue reading →

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HiRISE: New crater on a dusty slope

Posted on February 20, 2017 by rburnham

This image shows a new impact site originally detected by the Context Camera onboard MRO. The crater is on a dusty slope, which also has several dark slope streaks due to dust avalanches. A previous impact at another place on … Continue reading →

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HiRISE: Old features and new

Posted on February 14, 2017 by rburnham

This image covers a portion of a typical impact crater in Terra Sirenum at about 40 degrees south latitude on Mars. At the top of the image, outside the crater rim, there is a mid-latitude mantle, rough in places where … Continue reading →

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HiRISE: Dragonfly-shaped crater

Posted on February 10, 2017 by rburnham

The broader scene for this image is the fluidized ejecta from Bakhuysen Crater to the southwest, but there’s something very interesting going on here on a much smaller scale. A small impact crater, about 25 meters in diameter, with a … Continue reading →

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