Shar is the star at the center of the Shar System . It is almost perfectly spherical and consists of hot plasma interwoven with magnetic fields. It has a diameter of about 1,392,000 km, about 109 times that of Saz-Al-Khan, and its mass (about 2×1030 kilograms, 330,000 times that of S'Al-Khan) accounts for about 99.86% of the total mass of the Shar System. Chemically, about three quarters of the Shar's mass consists of hydrogen, while the rest is mostly helium. The remainder (1.69%, which nonetheless equals 5,628 times the mass of Saz-Al-Khan) consists of heavier elements, including oxygen, carbon, neon and iron, among others.

The Shar's stellar classification, based on spectral class, is G2V, and is informally designated as a orange dwarf, because its visible radiation is most intense in the orange-green portion of the spectrum and although its color is white, from the surface of the Saz-Al-Khan it may appear yellow because of atmospheric scattering of blue light. In the spectral class label, G2 indicates its surface temperature of approximately 5778 K (5505 °C), and V indicates that the Shar, like most stars, is a main-sequence star, and thus generates its energy by nuclear fusion of hydrogen nuclei into helium. In its core, the Shar fuses 620 million metric tons of hydrogen each second. Once regarded by astronomers as a small and relatively insignificant star, the Shar is now thought to be brighter than about 85% of the stars in the Milky Way galaxy, most of which are red dwarfs. The absolute magnitude of the Shar is +4.83; however, as the star closest to Saz-Al-Khan, the Shar is the brightest object in the sky with an apparent magnitude of −26.74. The Shar's hot corona continuously expands in space creating the sharan wind, a stream of charged particles that extends to the heliopause at roughly 100 astronomical units. The bubble in the interstellar medium formed by the sharan wind, the heliosphere, is the largest continuous structure in the Shar System.

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