{ "title": "Dark Rays and Light-Tones", "authors": "HiRISE", "metadata": { "thumbnailURL": "https://static.uahirise.org/anews/2020-11-05/ESP_012560_1660.jpg", "excerpt": "This image shows a relatively youthful crater with dark rayed ejecta and a light-toned zone that extends beyond that ejecta." }, "version": "1.5", "identifier": "ESP_012560_1660", "language": "en", "layout": { "columns": 10, "width": 1024, "margin": 85, "gutter": 20 }, "documentStyle": { "backgroundColor": "#faf7f2" }, "components": [ { "role": "heading1", "layout": "heading1Layout", "text": "HiPOD: 5 November 2020" }, { "role": "divider", "layout": "bigDividerLayout", "stroke": { "width": 3, "color": "#8c2028" } }, { "role": "title", "layout": "halfMarginBelowLayout", "text": "Dark Rays and Light-Tones" }, { "role": "photo", "layout": "fullBleedLayout", "caption": "The bright ejecta consists of indurated fine materials, such as dust trapped by the roughened surface, then cemented over time. Less than 1 km across. (NASA/JPL/UArizona)", "URL": "https://static.uahirise.org/anews/2020-11-05/ESP_012560_1660.jpg" }, { "role": "body", "format": "html", "layout": "hipodMarginLayout", "text": "


This image shows a relatively youthful crater with dark rayed ejecta and a light-toned zone that extends beyond that ejecta.

The lighter-toned surface might be the “blast zone” as darker regolith material was “blown away” during the impact event. With HiRISE resolution, we can see that this is the wrong explanation. Instead, the bright ejecta consists of indurated fine materials, such as dust trapped by the roughened surface, then cemented over time.

" }, { "role": "photo", "layout": "fullBleedLayout", "caption": "A fuller view of the scene. Less than 5 km across. (NASA/JPL/UArizona)", "URL": "https://static.uahirise.org/anews/2020-11-05/ESP_012560_1660-2.jpg" }, { "role": "body", "format": "html", "layout": "hipodMarginLayout", "text": "


ID: ESP_012560_1660
date: 1 April 2009
altitude: 254 km (158 mi)

NASA/JPL/UArizona

" }, { "role": "caption", "format": "html", "layout": "halfMarginBothLayout", "text": "Enhanced color is less than 1 km across; black and white is less than 5 km. For full images with scalebars, see the above ID link to our website.

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