4 h 29 minAudiobook7 minSummaryRead it, hear it, the 15-minute summary, and print and large print at costPaperback · 6 × 9 in · printing soonHardcover · 6 × 9 in · printing soonAbout this book
What if every star is a sun, and Earth is only one world among many?
On warm evenings in a country garden, a philosopher talks with a quick, curious Marquise. Their subject is the sky, but their conversation reaches far beyond what they can see. In Conversations on the Plurality of Worlds, Bernard de Fontenelle turns the astronomy of the seventeenth century into an exchange of questions, images and possibilities.
The journey begins with a moving Earth and opens toward a Moon that may be another world. Mercury, Venus, Mars, Jupiter and Saturn invite questions about life beyond our planet. Each evening builds on the last, asking the Marquise—and you—to reconsider Earth's place in the heavens. The science belongs to the 1600s; the pleasure lies in following an expanding view.
What you’ll discover
- A garden full of questions Step into an evening conversation where curiosity gives a difficult subject room to breathe.
- A listener who pushes back Meet a Marquise whose quick mind makes her much more than a silent audience.
- Earth leaves the centre Follow the shift from an Earth at the centre to a planet that moves.
- The possibility of other lives Explore how the philosopher imagines planets that may hold inhabitants unlike those on Earth.
- Stars become possible suns Let the conversation widen toward stars that may have worlds of their own.
Who will love it
For readers who love ideas explained with charm, witty conversations and astronomy, and anyone curious about how people first learned to think about other worlds.
What’s inside
The key ideas, in the 15-minute summary
- Science can be taught in a garden at night
- The Earth is a planet that moves
- The Moon may be a world like ours
- Other planets may hold different kinds of life
- Every fixed star may be a sun
- What has lasted and what has been replaced
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Conversations on the Plurality of Worlds
by Bernard de Fontenelle · 1686
In a garden at night, a curious Marquise and a philosopher explore whether the Moon and planets can hold life.
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In short
Conversations on the Plurality of Worlds is a short book of talk, published in France in 1686 by Bernard de Fontenelle. He was a writer and later the secretary of the Academy of Sciences in Paris.
From the 15-minute summary · Key idea 1
Science can be taught in a garden at night
Fontenelle chose the form of a dialogue on purpose. The speaker is a philosopher who tells the story in the first person, and his listener is a Marquise who lives on a country estate. They walk in her garden after dark, under a clear sky.
The Marquise is not a pupil who simply nods. She objects, jokes, draws her own comparisons and sometimes sees the point before he finishes making it. This keeps the talk lively and shows the reader that a person with no training can follow the argument.
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What is Conversations on the Plurality of Worlds about?
It is a dialogue in which a philosopher explains the new astronomy to a Marquise during evening walks in a garden. He argues that the Earth moves and that the Moon, planets and stars may hold other worlds.
Who is the Marquise in Fontenelle's book?
She is the philosopher's listener, a clever lady on a country estate. She asks questions, raises objections and makes her own comparisons, so she stands for the curious general reader.
When was Conversations on the Plurality of Worlds written?
It was published in France in 1686. It is not a true story but an invented conversation, used to explain real ideas of the time, such as the views of Copernicus and Descartes.
The author
Bernard de Fontenelle
1657–1757 · French Enlightenment writer and philosopher
Bernard de Fontenelle was a French writer and philosopher, born in Rouen in 1657. He later lived in Paris, where he died in 1757. He published Conversations on the Plurality of Worlds in 1686 and served as secretary of the French Academy of Sciences from 1697 to 1740.
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