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"Harsh land. Windswept valleys in northern #Africa"—Alexander Gerst via Twitter on July 6, 2014Alexander Gerst—ESA
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"Land use in South Africa, you can see where water is."—Alexander Gerst via Twitter on July 9, 2014.Alexander Gerst—ESA
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"Irrigation in the #Sahara #Desert looks like a challenging task from up here... #BlueDot"—Alexander Gerst via Twitter on July 28, 2014Alexander Gerst—ESA
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"An open history book of our planet: the #Sahara Desert"—Alexander Gerst via Twitter on July 26, 2014Alexander Gerst—ESA
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"An open history book of our planet: the # Sahara Desert"—Alexander Gerst via Twitter on July 26, 2014Alexander Gerst—ESA/SIPA USA
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"Close-up of gigantic Salar of Uyuni in Bolivia. You can even see the salt fields and the 'Cactus Island'."—Alexander Gerst via Twitter on July 15, 2014.Alexander Gerst—ESA
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"The #Moon was still behind the horizon. A #FataMorgana of atmospherical refraction #BlueDot"—Alexander Gerst via Twitter on July 14, 2014Alexander Gerst—ESA/SIPA USA
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"When I took this photo, I was sure these are clouds. But now I'm not so sure... #BlueDot"—Alexander Gerst via Twitter on July 7, 2014Alexander Gerst—ESA
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"Probably a river in Kazakhstan or slightly west of it."—Alexander Gerst via Twitter on July 29, 2014Alexander Gerst—ESA/SIPA USA
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"An open history book of our planet: the #Sahara Desert"—Alexander Gerst via Twitter on July 26, 2014Alexander Gerst—ESA
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"Human-made fires in East Africa. Can you spot them?"—Alexander Gerst via Twitter on July 9, 2014Alexander Gerst—ESA
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