Observatio Transitus Veneris Ante Discum Solis Die 3. Jun. Anno 1769 Wardöehusii (Hardcover) (ISBN-13: 9781020185274)

Hell's observations of the transit of Venus across the sun in 1769 were among the most accurate made at the time, and contributed greatly to our understanding of the solar system. This volume includes Hell's detailed notes and measurements from the event, along with commentary by modern astronomers.

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