Like ancient mariners, astronauts exploring the solar system will navigate by the stars. But when man finally ventures to the stars themselves, says NASA Mathematician and Physicist Saul Moskowitz in a Sky and Telescope article, navigation will become more of a problem. In place of the familiar and steadfast constellations he has learned to rely on, the star traveler will encounter a mystifying and spectacularly changing sky in which stars move, change color, brighten, disappear, and magically cluster together in front of him.
In a study he headed while working at Long...
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