File:ISS-57 Sergey Prokopyev works in the Columbus module (2).jpg

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English: Russian Cosmonaut Sergey Prokopyev, during the Plasma Krystall-4 (PK-4) Experiment. PK-4 is a scientific collaboration between the European Space Agency (ESA) and the Russian Federal Space Agency (Roscosmos), performing research in the field of "Complex Plasmas". Complex or dusty plasmas are plasmas which contain beside electrons, ions, and neutral gas in addition micro-particles, e.g., dust grains. Due to the strong influence of gravity on the micro-particles, most experiments on complex plasmas are strongly distorted or even impossible on earth, and therefore, require microgravity conditions.
Date Taken on 7 November 2018
Source https://www.flickr.com/photos/nasa2explore/44278232100/
Author NASA
This image or video was catalogued by Johnson Space Center of the United States National Aeronautics and Space Administration (NASA) under Photo ID: ISS057-E-074488.

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This image, originally posted to Flickr, is currently not available on Flickr under the license specified on this page. However, please see {{PD-NASA}} for permission to use it under this license.
Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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current17:57, 30 November 2018Thumbnail for version as of 17:57, 30 November 20185,568 × 3,712 (3.25 MB)Ras67 (talk | contribs)== {{int:filedesc}} == {{Information |description={{en|1=Russian Cosmonaut Sergey Prokopyev, during the Plasma Krystall-4 (PK-4) Experiment. PK-4 is a scientific collaboration between the European Space Agency (ESA) and the Russian Federal Space Agency (Roscosmos), performing research in the field of "Complex Plasmas". Complex or dusty plasmas are plasmas which contain beside electrons, ions, and neutral gas in addition micro-particles, e.g., dust grains. Due to the strong influence of gravit...

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