Discovery of the nutation of the Earth's axis (1740s observations)

Target entity: Discovery of the nutation of the Earth's axis (1740s observations)
Context triple: [James Bradley, notableWork, Discovery of the nutation of the Earth's axis (1740s observations)]

• A. On the Measurement of the Earth
  "On the Measurement of the Earth" is an ancient treatise in which Eratosthenes used geometric reasoning and observations of the Sun to calculate the Earth's circumference with remarkable accuracy.
• B. On the Sizes and Distances of the Sun and Moon
  On the Sizes and Distances of the Sun and Moon is an ancient Greek astronomical treatise that presents one of the earliest known geometric attempts to quantify the relative sizes and distances of the Sun and Moon from Earth.
• C. Rudolphine Tables
  The Rudolphine Tables are a landmark 17th-century star catalog and set of astronomical tables compiled by Johannes Kepler, renowned for their unprecedented accuracy in predicting planetary positions.
• D. Milanković calendar
  The Milanković calendar is a 20th-century reform of the Julian calendar, designed by Serbian scientist Milutin Milanković to more accurately align the civil year with the solar year and used by some Eastern Orthodox churches.
• E. Gauss’s planetary equations
  Gauss’s planetary equations are a set of differential equations in celestial mechanics that describe how a planet’s orbital elements change over time under the influence of perturbing forces.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: Discovery of the nutation of the Earth's axis (1740s observations)
Target entity description: The "Discovery of the nutation of the Earth's axis" refers to James Bradley’s 18th-century identification of a small, periodic wobble in Earth’s rotational axis, a key advance in understanding Earth’s motion and improving astronomical measurements.

• A. On the Measurement of the Earth
  "On the Measurement of the Earth" is an ancient treatise in which Eratosthenes used geometric reasoning and observations of the Sun to calculate the Earth's circumference with remarkable accuracy.
• B. On the Sizes and Distances of the Sun and Moon
  On the Sizes and Distances of the Sun and Moon is an ancient Greek astronomical treatise that presents one of the earliest known geometric attempts to quantify the relative sizes and distances of the Sun and Moon from Earth.
• C. Rudolphine Tables
  The Rudolphine Tables are a landmark 17th-century star catalog and set of astronomical tables compiled by Johannes Kepler, renowned for their unprecedented accuracy in predicting planetary positions.
• D. Milanković calendar
  The Milanković calendar is a 20th-century reform of the Julian calendar, designed by Serbian scientist Milutin Milanković to more accurately align the civil year with the solar year and used by some Eastern Orthodox churches.
• E. Gauss’s planetary equations
  Gauss’s planetary equations are a set of differential equations in celestial mechanics that describe how a planet’s orbital elements change over time under the influence of perturbing forces.
• F. None of above. chosen