描述Phobos colour 2008.jpg	العربية: صورة ملونة للقمر فوبوس أحد أقمار المريخ، التقطت في 23 مارس 2008 بواسطة مارس ريكونيسانس أوربيتر. English: Color image of Phobos, imaged by the Mars Reconnaissance Orbiter on 23 March 2008. The High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter took two images of the larger of Mars' two moons, Phobos, within 10 minutes of each other on 23 March 2008. This is the first, taken from a distance of about 6,800 kilometers (about 4,200 miles). It is presented in color by combining data from the camera's blue-green, red, and near-infrared channels. The illuminated part of Phobos seen in the images is about 21 kilometers (13 miles) across. The most prominent feature in the images is the large crater Stickney in the lower right. With a diameter of 9 kilometers (5.6 miles), it is the largest feature on Phobos. The color data accentuate details not apparent in black-and-white images. For example, materials near the rim of Stickney appear bluer than the rest of Phobos. Based on analogy with materials on our own moon, this could mean this surface is fresher, and therefore younger, than other parts of Phobos. A series of troughs and crater chains is obvious on other parts of the moon. Although many appear radial to Stickney in this image, recent studies from the European Space Agency's Mars Express orbiter indicate that they are not related to Stickney. Instead, they may have formed when material ejected from impacts on Mars later collided with Phobos. The lineated textures on the walls of Stickney and other large craters are landslides formed from materials falling into the crater interiors in the weak Phobos gravity (less than one one-thousandth of the gravity on Earth). In the full-resolution version of this image, a pixel encompasses 6.8 meters (22 feet), providing a resolution (smallest visible feature) of about 20 meters (about 65 feet). The image is in the HiRISE catalog as PSP_007769_9010. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Mars Reconnaissance Orbiter for NASA's Science Mission Directorate, Washington. Lockheed Martin Space Systems, Denver, is the prime contractor for the project and built the spacecraft. The High Resolution Imaging Science Experiment is operated by the University of Arizona, Tucson, and the instrument was built by Ball Aerospace & Technologies Corp., Boulder, Colo. Polski: Kolorowa fotografia Fobosa, księżyca Marsa, wykonana przez sondę Mars Reconnaissance Orbiter w dniu 23 marca 2008 roku. Русский: Цветное изображение Фобоса, созданное АМС Mars Reconnaissance Orbiter в 2008 году
日期	2008年3月23日
來源	http://photojournal.jpl.nasa.gov/catalog/PIA10368
作者	NASA / JPL-Caltech / University of Arizona
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其他版本	Similar black and white image, taken about ten minutes later (3,963 × 3,360 pixels, 2.6 MB)
圖中地點 InfoField	http://www.nasa.gov/mission_pages/MRO/multimedia/pia10368.html

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This image was selected as picture of the day on Wikimedia Commons for 31 July 2019. It was captioned as follows: English: Color image of Phobos, imaged by the Mars Reconnaissance Orbiter on 23 March 2008. Other languages: Čeština: Uměle dobarvovaná fotografie marsova měsíce Phobos pořízená sondou Mars Reconnaissance Orbiter dne 23. března 2008. English: Color image of Phobos, imaged by the Mars Reconnaissance Orbiter on 23 March 2008. Español: Imagen en color de Fobos producida por el Mars Reconnaissance Orbiter el 23 de marzo de 2008. Italiano: Immagine a colori di Fobos, ripresa dal Mars Reconnaissance Orbiter il 23 marzo 2008. Magyar: Színes felvétel a Phoboszról, melyet a Mars Reconnaissance Orbiter készített 2008. március 28-án Nederlands: Kleurenopname van Phobos, een van de twee manen van de planeet Mars Polski: Kolorowa fotografia Fobosa, księżyca Marsa, wykonana przez sondę Mars Reconnaissance Orbiter w dniu 23 marca 2008 roku. Português: Imagem colorida de Fobos fotografado pela Mars Reconnaissance Orbiter em 23 de março de 2008. Македонски: Поглед на Фобос — една од двете месечини на Марс. Русский: Цветное изображение Фобоса, созданное АМС Mars Reconnaissance Orbiter в 2008 году. 한국어: 2008년 3월 23일 화성 정찰선이 촬영한 포보스의 사진. 中文（繁體）： :zh:火衛一的彩色影像，由 :zh:火星偵察軌道衛星於2008年3月23日拍攝。

The High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter took two images of the larger of Mars' two moons, Phobos, within 10 minutes of each other on March 23, 2008. This is the first, taken from a distance of about 6,800 kilometers (about 4,200 miles). It is presented in color by combining data from the camera's blue-green, red, and near-infrared channels.

The illuminated part of Phobos seen in the images is about 21 kilometers (13 miles) across. The most prominent feature in the images is the large crater Stickney in the lower right. With a diameter of 9 kilometers (5.6 miles), it is the largest feature on Phobos.

The color data accentuate details not apparent in black-and-white images. For example, materials near the rim of Stickney appear bluer than the rest of Phobos. Based on analogy with materials on our own moon, this could mean this surface is fresher, and therefore younger, than other parts of Phobos.

A series of troughs and crater chains is obvious on other parts of the moon. Although many appear radial to Stickney in this image, recent studies from the European Space Agency's Mars Express orbiter indicate that they are not related to Stickney. Instead, they may have formed when material ejected from impacts on Mars later collided with Phobos. The lineated textures on the walls of Stickney and other large craters are landslides formed from materials falling into the crater interiors in the weak Phobos gravity (less than one one-thousandth of the gravity on Earth).

In the full-resolution version of this image, a pixel encompasses 6.8 meters (22 feet), providing a resolution (smallest visible feature) of about 20 meters (about 65 feet). The image is in the HiRISE catalog as PSP_007769_9010.

NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Mars Reconnaissance Orbiter for NASA's Science Mission Directorate, Washington. Lockheed Martin Space Systems, Denver, is the prime contractor for the project and built the spacecraft. The High Resolution Imaging Science Experiment is operated by the University of Arizona, Tucson, and the instrument was built by Ball Aerospace & Technologies Corp., Boulder.