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      • This back and forth motion, called the annual parallax, could only be interpreted as being caused by the motion of Earth around the Sun. Astronomers had known for centuries that such an effect must occur, but Bessel was the first to demonstrate it accurately.
      www.britannica.com › biography › Friedrich-Wilhelm-Bessel

      Friedrich Wilhelm Bessel | Biography & Facts | Britannica

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  3. en.wikipedia.org › wiki › Friedrich_Wilhelm_BesselFriedrich Wilhelm Bessel - Wikipedia

    Bessel determined the first reliable value for the distance between a star and the solar system with a heliometer from Fraunhofer using the method of stellar parallax. In 1838 he published a parallax of 0.314 arcseconds for 61 Cygni , which indicated that the star is 10.3 ly away.

  4. arxiv.org › pdf › 2009The First Stellar Parallaxes Revisited-Final - arXiv.org

    In 1838, Friedrich Wilhelm Bessel published two papers reporting what has generally been considered to be the first highly significant measurement of the distance to a star.

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  6. phys.org › news › 2020-11-long-standing-mysteriesResolving long-standing mysteries about the first parallaxes ...

    In 1838, Friedrich Wilhelm Bessel won the race to measure the first distance to a star other than our Sun via the trigonometric parallax—setting the first scale of the universe.

  7. scitechdaily.com › the-distances-of-the-starsThe Distances of the Stars: Resolving Long-standing Mysteries ...

    Nov 22, 2020 · In 1838, Friedrich Wilhelm Bessel won the race to measure the first distance to a star other than our Sun via the trigonometric parallax – setting the first scale of the Universe. Recently, Mark Reid and Karl Menten, who are engaged in parallax measurements at radio wavelengths, revisited Bessel’s original publications on “his” star, 61 ...

  8. www.britannica.com › Friedrich-Wilhelm-BesselFriedrich Wilhelm Bessel | Biography & Facts | Britannica

    Apr 17, 2024 · Friedrich Wilhelm Bessel, German astronomer whose measurements of positions for about 50,000 stars and rigorous methods of observation took astronomy to a new level of precision. He was the first to measure the parallax, and hence the distance, of a star other than the Sun. Learn more about Bessel’s life and work.

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  9. link.springer.com › referenceworkentry › 10Bessel, Friedrich Wilhelm | SpringerLink

    Jul 2, 2017 · Friedrich Bessel, one of the most skilled astronomical observers of his time, made the first published determination of stellar parallax and distance, produced numerous volumes of his own observations, reduced observations of others, and contributed to advanced mathematics and celestial mechanics.

  10. link.springer.com › content › pdfFriedrich Wilhelm Bessel: 61 Cygni - Springer

    by the Munich opticians and installed in 1829, Bessel made observations of 61 Cygni from 1837 to 1840. During this time, he determined the parallax to 61 Cygni was 0.314 arcseconds, which corresponded to a distance of Fig. 10.2 Illustration showing stellar parallax geometry 10 Friedrich Wilhelm Bessel: 61 Cygni

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