Newton's Laws of Motion, particularly the law of universal gravitation, form the basis for describing the motion of celestial bodies in Astrodynamics.

Orbit refers to the curved path that a celestial body follows as it revolves around another body due to gravitational attraction.

Kepler's Third Law establishes a relationship between the orbital period and the semi-major axis of a planet's orbit.

Perigee refers to the point in an orbit where a celestial body is closest to Earth, while Apogee is used for the farthest point.

Inclination measures the angle between the orbital plane of a celestial body and a reference plane.

Parabolic Orbits are not typically considered in Astrodynamics, as they represent an escape trajectory.

Rate of Precession refers to the change in the argument of perigee over time.

Aphelion refers to the point in an orbit where a celestial body is farthest from the Sun, while Perihelion is used for the closest point.

Relativistic Effects are typically not considered as perturbations in Astrodynamics, as they are generally negligible for most celestial bodies.

Right Ascension of the Ascending Node measures the angle between the ascending node of an orbit and the vernal equinox.

Lagrange's Method is not typically used for orbit determination in Astrodynamics.

True Anomaly measures the angle between the radius vector of a celestial body and the direction of its velocity.

Lagrange Point Maneuver is not a commonly used spacecraft maneuver in Astrodynamics.

Argument of Perigee measures the angle between the ascending node of an orbit and the perigee.

Galactic Coordinate System is not commonly used in Astrodynamics.