Cosmic Queries – The Deep
StarTalk Radio
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Understanding the Cosmic Vacuum
This chapter unpacks the concept of vacuum in space, clarifying that it is not empty but lacks air molecules, and discusses the challenges in achieving a perfect vacuum. It contrasts densities of various celestial objects, exploring intriguing implications about life in space, the Moon's impact on astronomy, and the shape of the universe. The chapter concludes with reflections on light as a time traveler, allowing us to observe the universe's history and evolution since the Big Bang.
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