Carl Sagan - discu.eu

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Today is the 85th Birthday of Carl Sagan, pioneer of space and science outreach https://physicstoday.scitation.org/do/10.1063/pt.5.031348/full/ 351 comments 9/11/2019 space

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A Pale Blue Dot | The Planetary Society https://www.planetary.org/explore/space-topics/earth/pale-blue-dot.html 7 comments

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