{
  "title": "Gully Watch",
  "authors": "HiRISE",
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    "excerpt": "This massive dune where these gullies are located is on the eastern end of the Argyre impact basin."
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  "identifier": "ESP_055348_1315",
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        "text": "HiPOD: MONDAY, 17 FEBRUARY 2020"
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        "text": "Gully Watch"
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    {
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        "caption": "The dune field covers almost the entire swath of our camera’s view, just under 5 km across. (NASA/JPL/UArizona)",
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        "text": "<p><br />This observation shows a massive dune (likely at least 5 kilometers across) in the Argyre region of Mars. Our primary interest are the large gullies and the changes that we can monitor across the seasons. Since we know these gullies are changing, we call them “active.” The question remains: what is the extent of the activity?<br /></p>"
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        "text": "<p>Argyre Planitia is a large plain located within the 1,800 kilometer-wide Argyre Basin that likely formed close to 4 billion years ago during the Late Heavy Bombardment of the early solar system. There may have also been past water flows into the basin. Our image is on the eastern end of the plain.<br /></p>"
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              "URL": "bundle://ESP_055348_1315-02-17-2.jpg",
              "caption": "A cutout showing some of the gullies. Less than 1 km across. (NASA/JPL/UArizona)"
            },
            {
              "URL": "bundle://ESP_055348_1315-02-17-3.jpg",
              "caption": "Another enhanced color cutout at full resolution. The bright spots are likely frost. Less than 1 km across. (NASA/JPL/UArizona)"
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        "text": "<p>ID: <a href='https://uahirise.org/ESP_055348_1315'>ESP_055348_1315</a><br />date: 18 May 2018 <br />altitude: 252 km<br /><br />NASA/JPL/UArizona</a></p>"
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        "text": "Black and white images are less than 5 km across. Enhanced color images are less than 1 km across. For images with scalebars, see the above ID link to our website.<br />"
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