Tagorus System

Tagorus System

Age	4.568 billion years
System mass	1.0014 Solar masses
Planetary system
Distance to Kuiper cliff	50 AU
Populations
Stars	1 (Sun)
Known planets	5 (Gilmeon Terra Ceralis Jocastia Thetune Chetobos)
Known natural satellites	11
Known comets	4,143
Orbit about Galactic Center
Distance to Galactic Center	27,000 ± 1,000 ly
Orbital speed	220 km/s; 136 mps
Orbital period	225–250 myr
Star-related properties
Spectral type	G2V
Frost line	≈5 AU
Distance to heliopause	≈120 AU
Hill sphere radius	≈1–3 ly

The Tagorus System, also known as the Solar System is the gravitationally bound system of the star Tagorus, also refered to as the Sun, and the objects that orbit it, either directly or indirectly. Of the objects that orbit the Sun directly, the largest are the five planets, with the remainder being smaller objects. Of the objects that orbit the Sun indirectly—the natural satellites—one is larger than the smallest planet, Chetobos.

The Solar System formed 4.6 billion years ago from the gravitational collapse of a giant interstellar molecular cloud. The vast majority of the system's mass is in the Sun, with the majority of the remaining mass contained in Thetune. The four smaller rocky planets, Gilmeon, Terra Ceralis, Jocastia and Chetobos, are terrestrial planets, being primarily composed of rock and metal. Thetune is a giant planet, being substantially more massive than the terrestrials, being composed mainly of hydrogen and helium. All five planets have almost circular orbits that lie within a nearly flat disc called the ecliptic.

Structure and composition

The principal component of the Solar System is the Sun, a G2 main-sequence star that contains 99.86% of the system's known mass and dominates it gravitationally. The Sun's largest orbiting body, the giant planet, accounts for 99% of the remaining mass. The remaining objects of the Solar System (including the four terrestrial planets, moons, asteroids, and comets) together comprise less than 0.002% of the Solar System's total mass.

Most large objects in orbit around the Sun lie near the plane of Terra's orbit, known as the ecliptic. The planets are very close to the ecliptic, whereas comets are frequently at significantly greater angles to it. As a result of the formation of the Solar System, planets (and most other objects) orbit the Sun in the same direction that the Sun is rotating (counter-clockwise, as viewed from above Terra's north pole).