NASAのインスタグラム(nasa) - 10月12日 02時44分

This timelapse video from space was taken by ESA astronaut Alexander Gerst from the Cupola observatory module on the International Space Station as it orbited Earth at around 400 km altitude. As the Space Station passes over Earth at night we can see city lights and lightning. The International Space Station travels at 28 800 km/h meaning that it only takes 90 minutes to circle Earth completely. 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.

Video credit: ESA
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