This article belongs to the lore of Eurth.

Sanar System

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The Sunnar System is a collection of orbiting celestial bodies that are gravitionally bound to the Sun. The Sunnar System began its formation 4.6 Billion years ago as a result of the gravitational collapse of a large interstellar molecular cloud. The vast majority of the Sunnar System's mass is found within its star the Sun (99.80%), with the majority of remaining matter situated in the two gas giants of Satre and Diaphres. There are 12 to 14 planets in the Sunnar System, with the status of Paidios and Pluta as either major planets or minor planets disputed within the scientific community[1].

The seven sunward planets - Hyperion, Balder, Eurth, Laran, Maraz, Petrus, and Andreus - and the three outer planets - Paidios, Pluta, and Vanth - are terrestrial planets composed of rock, metals, and ices. The four gaseous planets are significantly larger and more massive than the terrestrial planets possessing the overwhelming majority of Sun-orbiting matter, primarily made up of gaseous elements and molecules. All inner terrestrial and gaseous planets have nearly circular orbits that lie on the ecliptic plane however the outer planets possess more eccentric orbits that intersect the ecliptic.

Sunnar System
A diagram of the major celestial bodies of the Sunnar System. Size to scale.
Age4.559 billion years
System mass1.0020 Solar masses
Planetary system
Semi-major axis of outer planet (Vanth)30.10 AU  (4.503 billion km)
Distance to Kuiper cliff50 AU
Populations
Stars1  (Sun)
Planets
12-14 Planets
  • Hyperion
  • Balder
  • Eurth
  • Laran
  • Maraz
  • Petrus & Andreus
  • Satre
  • Diaphres
  • Ether
  • Thanatos
  • Paidios (Disputed)
  • Pluta (Disputed)
  • Vanth
Known dwarf planets2 (Disputed)
Orbit about Galactic Center
Invariable-to-galactic plane inclination69.42°0  (ecliptic)
Distance to Galactic Center27,000 ± 1,000 ly
Orbital speed210 km/s
Orbital period225–250 Myr
Star-related properties
Spectral typeG2V
Frost line≈5 AU
Distance to heliopause≈120 AU
Hill sphere radius≈1–2 ly
Temporary list of planets and their characteristics, to be deleted once page is set up.
Name Mass (M🜨) Radius (R🜨) Density (g/cm3) Semi-Major Axis (AU) Orbital Period (🜨-Days) Rotational Period (🜨-Days) Major Natural Satelites
Hyperion 0.139 0.485 6.74 0.0778 6.76 6.76 n/a
Balder 0.237 0.878 1.93 0.673 202 2.23 Nanna
Eurth 1.000 1.000 5.51 1.000 365.2425 1.000 Moon/Mun
Laran 0.819 0.911 5.98 1.55 708.56 708.56 n/a
Maraz 0.143 0.585 3.93 2.91 1813 WIP n/a
Petrus WIP 0.385 WIP 4.59 3591 WIP Paulus*
Andreus WIP 0.385 WIP 4.59 3591 WIP Paulus*
Satre 480.560 11.150 1.90 6.36 5843.84 18.01 Albus
Diaphres WIP 10.782 WIP 11.0 13324 WIP Apollo**, Nortia**, Maris, Artemis
Ether 30.809 7.254 WIP 20.1 40161 0.67 Thalassa
Thanatos 18.282 3.94 WIP 38.7 87922 WIP Geras, Oizys, Moros, Apate
Paidios 0.0504 0.416 3.86 50.7 131883 WIP Mayanese
Pluta 0.00344 0.218 1.83 61.4 175844 WIP n/a
Vanth 0.671 0.866 5.31 84.4 283061 2.23 n/a

*Petrus and Andreus are a co-orbiting binary pair with a P-type orbiting moon (Paulus).

**Apollo and Nortia are a co-orbiting binary pair that orbit Diaphres together.