The original Pale Blue Dot photograph of planet Earth was taken by Voyager 1, 28 years ago today, as part of the Solar System family portrait. Its purpose as a semantic denotation, or what what Jonassen would call "an object to think with" inevitably leads to Carl Sagan's famous discourse. Continue Reading →
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Tags: carl sagan • cosmos • e-learning • Jonassen • mindtools • Pale Blue Dot • Popular Science • semantics • Space Exploration • Voyager 1