Term
|
Definition
|
|
Term
|
Definition
| a small circle whose center moved uniformly around Earth on a second and larger circle |
|
|
Term
|
Definition
| a construct of the geocentric model of the solar system which was needed to explain observed planetary motions |
|
|
Term
|
Definition
| the observed motions of the planets made it impossible to assume that they moved on a simple circular paths around Earth |
|
|
Term
| The full Ptolemaic required |
|
Definition
| a series of no fewer than 80 distinct circles |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
| Tycho maintained meticulous and accurate records of |
|
Definition
| stars, planets, and other noteworthy celestial events |
|
|
Term
|
Definition
| the shape of each planet's orbit by triangulation from Tycho Brahe |
|
|
Term
| The orbital paths of the planets are |
|
Definition
| elliptical, with the Sun at focus |
|
|
Term
|
Definition
|
|
Term
|
Definition
| one of two special points within an ellipse, whose separation from each other indicates the eccentricity |
|
|
Term
| an imaginary line connecting the Sun to any planet |
|
Definition
| sweeps out equal areas of the ellipse in equal intervals of time |
|
|
Term
|
Definition
| the coolest approach to the Sun of any object in orbit about it |
|
|
Term
|
Definition
| the point on the elliptical path of an object in orbit about the Sun that is most distant from the Sun |
|
|
Term
| The square of a planet's orbital period is proportional to the cube of its |
|
Definition
|
|
Term
|
Definition
| essentially the average distance between Earth and the Sun |
|
|
Term
|
Definition
|
|
Term
|
Definition
| the "average" position of all the matter making up the two bodies |
|
|
Term
|
Definition
| attain enough speed to escape our planet's gravity and move away from Earth forever |
|
|
Term
|
Definition
| orbital and distance; The square of a planet’s orbital period (measured in years) is equal to the cube of its semi-major axis (average distance from the Sun) measured in A.U. |
|
|
