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The Space Mirror That Turned Night into Day

Solar sail technology was once only theoretical, but it’s now being developed to propel spaceships. How did the first solar sails get into space, and why?

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Sources:

Znamya:
http://www.smithsonianmag.com/smart-news/how-russian-space-mirror-briefly-lit-night-180957894/
https://motherboard.vice.com/en_us/article/9a3y8d/the-man-who-turned-night-into-day
http://news.bbc.co.uk/1/hi/sci/tech/271224.stm
http://news.bbc.co.uk/2/hi/science/nature/273220.stm
http://news.bbc.co.uk/1/hi/sci/tech/272103.stm
http://news.bbc.co.uk/1/hi/sci/tech/272489.stm
http://news.bbc.co.uk/1/hi/sci/tech/272153.stm
http://www.nytimes.com/1993/01/12/science/russians-to-test-space-mirror-as-giant-night-light-for-earth.html
http://www.nytimes.com/1993/02/05/world/russia-s-mirror-in-space-reflects-the-light-of-the-sun-into-the-dark.html
http://www.nytimes.com/1999/02/04/world/space-based-mirror-may-light-skies-tonight.html
http://www.cbat.eps.harvard.edu/iauc/07100/07104.html#Item1
http://www.seas.upenn.edu/~lior/documents/Mirrorsinthesky-Statussustainabilityandsomesupportingmaterialsexperiments.pdf
http://www.edu.pe.ca/gray/class_pages/krcutcliffe/physics521/17reflection/articles/Znamya%20Space%20Mirror.htm
http://www.washingtonpost.com/wp-dyn/content/article/2006/09/30/AR2006093001038.html
http://spectrum.ieee.org/aerospace/space-flight/stellar-engineer

Images:

https://commons.wikimedia.org/wiki/File:Frank_Drake_-_edit.jpg
https://commons.wikimedia.org/wiki/File:N.Tesla.JPG
https://en.wikipedia.org/wiki/File:IKAROS_solar_sail.jpg
https://commons.wikimedia.org/wiki/File:Solar_sail_tests.jpg
https://commons.wikimedia.org/wiki/File:Roscosmos_logo_en.svg

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