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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