Space story ~ 15 
Dunes of sand-sized materials have been trapped on the floors of many Martiancraters. This is on e example, from a crater in Noachis Terra, west of the giantHellas impact basin. The High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter captured this view on Dec. 28, 2009.
The dunes here are linear, thought to be due to shifting wind directions. In places, each dune is remarkably similar to adjacent dunes, including a reddish (or dust colored) band on northeast-facing slopes. Large angular boulders litter the floor between dunes.
The most extensive linear dune fields know in the solar system are on Saturn's large moon Titan. Titan has a very different environment and composition, so at meter-scale resolution they probably are very different from Martian dunes.
This image covers a swath of ground about 1.2 kilometers (three-fourth of a mile) wide, centered at 42.7 degrees south latitude, 38.0 degrees east longitude. It is on e product from HiRISE observation ESP_016036_1370.
The season on Mars is southern-hemisphere autumn.
Other image products from this observation are available athttp://hirise.lpl.arizona.edu/ESP_016036_1370
The University of Arizona, Tucson, operates the HiRISE camera, which was built by Ball Aerospace & Technologies Corp., Boulder, Colo. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology, Pasadena, manages the Mars Reconnaissance Orbiter for the NASA Science Mission Directorate, Washington. Lockheed Martin Space Systems, Denver, is the prime contractor for the project and built the spacecraft. Image Credit: NASA/JPL-Caltech/University of Arizona
간단히 번역하자면 나사는 저걸 모래언덕이라고 표현하고있습니다. 거대 크래이터 내부에 저런 구조물이 꽤 많다고 하네요. 이 사진은 하나의 예라고 합니다. 뭐든지 감추기 좋아하는 나사인들...
어떤 믿을만한 음모론에 의하면 화성의 하늘은 푸르다고 하네요.
사진전문가들이 분석한 결과 화성의 하늘이 조작되었다고 합니다.
붉게 뽀샵처리한거라는 의미죠. 아무튼 화성은 신기합니다. (NASA 보도)
 
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