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    ESA > Television > 2014 > 09 > Day and night
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    Day and night

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    • Video Online only
    • Title Day and night
    • Released: 24/09/2014
    • Length 00:00:51
    • Language English
    • Footage Type Exterior shot
    • Copyright ESA
    • Description

      It takes 90 minutes for an astronaut on the International Space Station to circle Earth completely, passing from daytime to nighttime and back again. This video taken by ESA astronaut Alexander Gerst shows the view from space in under one minute. Each orbit the Station moves around 2200 km to the West in relation to 90 minutes before.

      Astronauts often use normal consumer digital cameras to take pictures of Earth through Europe’s observatory module Cupola in their spare time. Setting the camera to take an image every few seconds and then playing the images back quickly create this timelapse effect.

      Alexander worked as a geophysicist and volcanologist before he was chosen as an ESA astronaut in 2009. His Blue Dot mission includes an extensive scientific programme of experiments in physical science, biology, and human physiology as well as radiation research and technology demonstrations. All experiments chosen make use of the out-of-this-world laboratory to improve life on Earth or prepare for further human exploration of our Solar System.

      Read more about his mission at http://www.esa.int/Our_Activities/Human_Spaceflight/Blue_dot
      Follow Alexander here: http://alexandergerst.esa.int/

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    • Activity Human Spaceflight
    • Mission Blue Dot
    • People Alexander Gerst
    • System ISS
    • Keywords Earth views (taken by astronauts), Time-lapse

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