File:Clouds over lava flows on Mars ESA384876.jpg

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English: Diffuse, water-ice clouds, a hazy sky and a light breeze. Such might have read aweather forecastfor the Tharsis volcanic region on Mars on 22 November 2016, when this image was taken by the ExoMars Trace Gas Orbiter.

Clouds, most likely of water-ice, and atmospheric haze in the sky are coloured blue/white in this image. Below, 630 km west of the volcano Arsia Mons, the southernmost of the Tharsis volcanoes, outlines of ancient lava flows dominate the surface. The dark streaks are due to the action of wind on the dark-coloured basaltic sands, while redder patches are wind blown dust. A handful of small impact craters can also be seen. The Trace Gas Orbiter, a joint effort between ESA and Roscosmos, arrived at Mars on 19 October last year. Since March it has been repeatedly surfing in and out of the atmosphere, generating a tiny amount of drag that will steadily pull it into a near-circular 400 km altitude orbit. It is expected to begin its full science operational phase from this orbit in early 2018. Prior to this ‘aerobraking’ phase,several test periodswere assigned to check the four science instrument suites from orbit and to refine data processing and calibration techniques. The false-colour composite shown here was made from images taken with the Colour and Stereo Surface Imaging System, CaSSIS, in the near-infrared, red and blue channels.

The image is centred at 131°W / 8.5°S. The ground resolution is 20.35 m/pixel, and the image is about 58 km across. At the time the image was taken, the altitude was 1791 km, yielding a ground track speed of 1.953 km/s.
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Source http://www.esa.int/spaceinimages/Images/2017/10/Clouds_over_lava_flows_on_Mars
Author European Space Agency
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(Reusing this file)		 ESA/Roscosmos/CaSSIS,CC BY-SA 3.0 IGO
Title
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Clouds over lava flows on Mars
Set
InfoField
Space Science image of the week
Mission
InfoField
ExoMars
Activity
InfoField
Space Science

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Where expressly so stated, images or videos are covered by the Creative Commons Attribution-ShareAlike 3.0 IGO (CC BY-SA 3.0 IGO) licence, ESA being an Intergovernmental Organisation (IGO), as defined by the CC BY-SA 3.0 IGO licence. The user is allowed under the terms and conditions of the CC BY-SA 3.0 IGO license to Reproduce, Distribute and Publicly Perform the ESA images and videos released under CC BY-SA 3.0 IGO licence and the Adaptations thereof, without further explicit permission being necessary, for as long as the user complies with the conditions and restrictions set forth in the CC BY-SA 3.0 IGO licence, these including that:
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Attribution: ESA/Roscosmos/CaSSIS, CC BY-SA IGO 3.0
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Date/TimeThumbnailDimensionsUserComment
current15:55, 16 October 2017Thumbnail for version as of 15:55, 16 October 20172,848 × 2,002 (2.76 MB)Fæ (talk | contribs)European Space Agency, Id 384876, http://www.esa.int/spaceinimages/Images/2017/10/Clouds_over_lava_flows_on_Mars, User:Fæ/Project_list/ESA

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