Knowra Rudolphine Tables Rudolphine Tables The Rudolphine Tables are astronomical tables published by Johannes Kepler in 1627, giving predicted positions of the Sun, Moon, and planets using Tycho Brahe’s observations and Kepler’s planetary laws.
Kepler's laws of planetary motion : Three mathematical laws describing planetary orbits, orbital speeds, and the relation between orbital period and distance. These laws supplied the orbital model used to calculate planetary positions.
Johannes Kepler : A German astronomer and mathematician who formulated the laws of planetary motion. Kepler compiled and published the tables, applying his planetary theory to Brahe’s data.
Transit of Venus : An astronomical event in which Venus passes across the Sun’s disk as seen from Earth. The tables helped predict the 1631 transit, which Pierre Gassendi observed.
Geocentric model : A model of the cosmos that places Earth at its center, with celestial bodies moving around it. The tables’ predictions relied on Keplerian planetary theory rather than traditional geocentric arrangements.
Tycho Brahe's observations : A large body of precise pre-telescopic measurements of the positions of the Sun, Moon, planets, and stars. Kepler used Brahe’s measurements as the tables’ observational foundation.
Tycho Brahe : A Danish astronomer whose precise naked-eye observations transformed the empirical study of the heavens. Brahe’s observations, inherited by Kepler, made the tables unusually accurate.
Pierre Gassendi : A French philosopher, priest, and astronomer who observed the 1631 transit of Mercury and transit of Venus. Gassendi tested the tables’ prediction by observing the 1631 transit of Venus.
Copernican heliocentrism : The model that places the Sun near the center of the planetary system, with Earth orbiting it. Kepler’s tables put a mathematically refined heliocentric system to practical predictive use.
Kepler equation : An equation relating a planet’s mean anomaly to its eccentric anomaly in an elliptical orbit. Solving it helps determine a planet’s position along its orbit at a given time.
Astronomia nova : Kepler’s 1609 book presenting his discovery of elliptical planetary orbits and the area law. It records the research that established key methods later used in the tables.
Show all 24