Referring to the Earth's appearance from space; the Pale Blue Dot is a photograph of Earth taken in 1990 by the Voyager 1 spacecraft from a record distance of about 6 billion kilometers.
"pale-blue-dot." YourDictionary, n.d. Web. 14 October 2018. <http://www.yourdictionary.com/pale-blue-dot>.
pale-blue-dot. (n.d.). Retrieved October 14th, 2018, from http://www.yourdictionary.com/pale-blue-dot
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