Celestial Mechanics

Kepler's Law of Areas states that a line connecting a planet to the Sun sweeps out equal areas in equal time intervals, implying that a planet's orbital velocity changes as it moves closer or farther from the Sun.

Perihelion is the point in a planet's orbit where it is closest to the Sun. The opposite point, where the planet is farthest from the Sun, is called aphelion.

Pluto is known for its highly elliptical orbit and long orbital period, taking approximately 76 years to complete one orbit around the Sun.

The line of nodes is the imaginary line connecting the centers of two celestial bodies, such as a planet and the Sun, and defines the plane of their orbits.

Newton's Second Law of Motion states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

Aphelion is the point in a planet's orbit where it is farthest from the Sun. The opposite point, where the planet is closest to the Sun, is called perihelion.

Mercury has the shortest orbital period around the Sun, taking approximately 88 days to complete one orbit.

The semi-major axis is the imaginary line that passes through the center of a celestial body and is perpendicular to its orbital plane. It is half the length of the major axis of the ellipse that represents the body's orbit.

Kepler's Law of Periods states that the square of a planet's orbital period is proportional to the cube of its average distance from the Sun.

The longitude of the ascending node is the angle between the ascending node and the vernal equinox.

Neptune has the longest orbital period around the Sun, taking approximately 165 years to complete one orbit.

The ascending node is the point in a planet's orbit where it crosses the celestial equator moving from south to north.

Kepler's Law of Orbits states that a planet's orbit is an ellipse with the Sun at one of the foci.

The argument of perihelion is the angle between the ascending node and the perihelion.

Jupiter has the most moons, with over 80 known moons orbiting it.