Astronomy for Young Folks, by Isabel Martin Lewis, Part 10 (Conclusion)

Let's journey through the stars to sleep with our final reading from this marvelous book. This time, binary star systems, how to measure the vastness of our universe, and a quick summary of key astronomical facts, including the reminder that the parsec is a distance, not a unit of time. Take note, fans of a certain film.

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Read "Astronomy for Young Folks" at Project Gutenberg: https://www.gutenberg.org/ebooks/45112

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