ECHO-1237-3

## Cronus

Cronus photographed in true color, taken by the Barfuss Space Probe in orbit between Cronus and Heliades.

## Atmosphere

### Composition

* H2 92.8%
* He 6.82%
* CH4 0.27%

## Internal structure

### Internal composition

Outer layer* 38% liquid/metallic H2
* 3.64% liquid He
* 37.8% water/ice envelope

Mantle

* 18.2% silicate/carbide mantle

Core

* 2.42 dense/exotic metals

ECHO-1237-3, officially named Cronus, is the third planet from **Aldhahabi**, and is the largest in the ECHO-1237 system. It is classified as a temperate superjupiter, and harbors non-intelligent single and multicellular life.

## Name

Cronus is named after the Greek God of harvest and leader of the Titans.

## Physical characteristics

Cronus consists of a dense metallic core, a surrounding layer of liquid metallic hydrogen and traces of helium extending outward to about 70% of the radius of the planet, and an outer atmopshere consisting of 92.8% hydrogen and 6.82% helium. The core is estimated to take up 30-50% of the planets radius, and consists mostly of iron and silicate minerals, with several other heavy metals present like mercury, cadmium, and chromium. It has an average radius of about 77,207 km and is one-sixth the average density of **Alexander's Moon**, but is over 3411 times more massive.

Additionally, Cronus possesses a ring, albeit a very sparse one. It comprises less than 0.05% of the mass in orbit around Cronus. The ring system is extremely feint and resides at an average of 116,105 km from the surface of Cronus.

### Cloud features

Cronus is perpetually covered with clouds of ammonia crystals, containing ammonium hydrosulfide. The clouds are located in the tropopause layer of the atmosphere, forming bands at different latitudes, known as tropical regions. These are subdivided into lighter-hued *zones* and darker *belts*. These zones and belts are similar in appearance to Jupiter, with light orange, white, and cream accents. Two massive storms 3-4 times as large as Alexander's Moon are located 3° and 7° south of the equator, and appear to be growing in size.

## Natural satellites

Cronus has 79 known moons, 4 of which have formal names. It is estimated that there are another 110-140 outer-orbit irregular moons larger than 2.5 km in diameter. In addition, there are estimated to be several hundred moonlets with diameters of 50-500 meters within Cronus's feint ring.

#### ECHO-1237-3a - **Crius**

Crius is the largest and closest moon, named after the Greek titan. It has a mass of 0.716 Earth's and a gravitational force of 0.72 g, and comprises more than 65% of the mass in orbit around Cronus, including its faint rings. It orbits at an average distance of 397,600 km, with an orbital period of just 19 hours and 29 minutes. It's atmosphere consists of nearly 100% H2O, with trace elements such as C02, N2, and SO2, with an atmospheric pressure of 4.34·10^3 atm.

#### ECHO-1237-3b - **Paul's Moon**

Paul's Moon is the third largest and second closest moon, named after the systems co-discoverer Paul Lensin. It has a meager mass of 0.084 Earth's with only 0.09 g of gravitational force. It orbits at an average distance of 549,353.59 km, and is tidally locked with an orbit of 31 hours and 40 minutes. It completely lacks an atmosphere, but contains precious metals such as titanium, platinum, and zirconium.

#### ECHO-1237-3c - **Alexander's Moon**

Alexander's Moon is the second largest and third closest moon, it is named after Alexander Wright, the systems lead discoverer. It has a mass of 0.37 Earth's with a comfortable 0.75 g of gravitational force. It orbits at an average distance of 3,230,913 km, and is tidally locked with an orbit of 18.823 days. Its atmosphere consists of 74.2% N2, 22.6% O2, and ~1% H20 and other trace elements, with an atmospheric pressure of 1.31 atm.

It was colonized on E.D 12.05.2195 by the Earth-3 Colony, and was the first Earth-like moon colonized by humanity. Its capital city is New Alexandria and has a world population of 183,344. It was the first moon discovered to be harboring native life, and the only known case of life originating via panspermia, originating from Cronus's atmosphere and arrived due to a collision event 1.3 billion years ago.

#### ECHO-1237-3D.79 - **Peneus**

Peneus is the largest dwarf moon and farthest of all moons, it has a mass of 0.0004 moons, orbits at an average distance of 8,702,069 km, and is tidally locked with an orbital period of 83.213 days. It is primarily metallic and contains rare metals such as platinum, iridium, osmium, and rhodium.

### Photographs of Cronus's moons, ordered closest to farthest

ECHO-1237-3aECHO-1237-3bECHO-1237-3cECHO-1237-3D.79