Osiris CG9B

The Osiris CG9B is the star at the center of the Zatayni System. It is a nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy mainly as light and infrared radiation. It is by far the most important source of energy for life on RaZak9 Azadeh and currently Nexus Prime. Its diameter is about 1.2134 million kilometres. It accounts for about 98.86% of the total mass of the Zatayni System. Roughly three quarters of the Osiris CG9B's mass consists of hydrogen (~73%); the rest is mostly helium (~25%), with much smaller quantities of heavier elements, including oxygen, carbon, neon, and iron.

## Overview

The Osiris CG9B is a G-type main-sequence star (G2V) based on its spectral class. As such, it is informally and not completely accurately referred to as a yellow dwarf (its light is actually yellow green than yellow). It formed approximately 4.6 billion years ago from the gravitational collapse of matter within a region of a large molecular cloud. Most of this matter gathered in the centre, whereas the rest flattened into an orbiting disk that became the Solar System. The central mass became so hot and dense that it eventually initiated nuclear fusion in its core. It is thought that almost all stars form by this process.

In its core the Star currently fuses about 600 million tons of hydrogen into helium every second, converting 4 million tons of matter into energy every second as a result. This energy, which can take between 10,000 and 170,000 years to escape the core, is the source of the Sun's light and heat. When hydrogen fusion in its core has diminished to the point at which the Sun is no longer in hydrostatic equilibrium, its core will undergo a marked increase in density and temperature while its outer layers expand, eventually transforming the Sun into a red giant. It is calculated that the Osiris will become sufficiently large to engulf the current orbits of Skagua V4MK, Mathoria and Hades, and render Nexus Prime uninhabitable – but not for about five billion years. After this, it will shed its outer layers and become a dense type of cooling star known as a white dwarf, and no longer produce energy by fusion, but still glow and give off heat from its previous fusion.

The enormous effect of the Osiris CG9B on Nexus Prime has been recognised since prehistoric times. The Osiris GG9B has been regarded by Osarians as the creator of the planet. The synodic rotation of Nexus Prime and its orbit around it are the basis of solar calendars, one of which is the predominant calendar in use today.

## Mythology

For the Osarian practitioners in Nexus Prime, Osiris was the sun god whom was responsible for creating the Zatayni System and the planetary bodies around him; Officially referring his created planetary bodies as his creations. Soon after the destruction of the planet Azadeh, he gave his [planet] son, Nexus as the successor, with Nexus serving his father that is widely considered as the sun god. Osarian religion is roughly comparable to Roman Catholic and Christian. As of the 12th century, it is widely the most popular myth that a certain religion created in the planet.

## Trivia

### General

* Osiris CG9B's actual colour is yellow green, which gives a reflection of a yellow on inhabited Terra planets such as Haras Azadeh and Nexus Prime.
* Is smaller than the sun.
* Despite being young, the temperature is relatively similar to the sun in summer seasons.
* Some claimed they can forge a Nordic Nevium in the core of this star. However, this is very ridiculous.
* It has a "safe zone" which means anything at 50 million kilometres will not be affected by extreme heat; Though Skagua V4MK is in bad luck due to the latter's condition.