The Eris Solar System

Eris is a yellow G2 star on the main sequence, located about 2, 300, 000 light years away from Earth, in the Andromeda Galaxy.  It is approximately 6.6 billion years old.   And because of that, Eris is exactly 2.1 billion years older than our own sun.  Eris with a mass of  1.467e30 kg is roughly about 73.72 % the size of our own sun. (Our sun's mass is 1.99e30 kg).   Eris with a radius of 589,000 km is about 84.75 % the side of our sun. (Our sun's radius is 695,000 km).  Hence Eris is smaller and lighter than our own sun.  The surface temperature of Eris is close to 5,700 degrees Kelvin (a bit cooler than our sun).  This enables the continents of Populus to offer a wide variety of environments for plants and wildlife to flourish in.  

The Eris Solar System's is not so different from that of our Sun's Solar System.   Our Planetary system formation coincides with the process of Eris' formation in which Eris belongs to the generation of stars created about 6.6 billion years ago. It is a bit older than our sun.   A cloud of interstellar gas, dust, and ices containing several generations of material collapsed to form the nebula from which Eris and the rest of our solar system grew.  This collapse may have been triggered by a supernova explosion Cosmologists believe that because the material in the nebula was rotating to some degree, not all of the nebular material fell directly into the central mass that would become Eris.  Instead, some of the material was confined to the planetary system of Eris which we know today.  

The 3 planets that are revolving around Eris are Icarus (with its moon Phobos), Populus (with its moon Edirus) and Luopium (with its moon Brakas).   Populus has an axis that is tilted approximately 23 degrees which creates the different seasons on this world.

 

Planet	Distance from Eris (Earth=1 AU)*	Moons	Mass (kg)	Diameter (Earth=12,756 km)	Mean Surface Temp (Earth= -89 to 58°C )	Rings	Revolution  (Earth days)	Rotation Period (Hours)	Gravity at equator (Earth=1)	Atmospheric composition
Icarus	0.38	One	3.30e23	4,880	350-420	no	87	58	0.38	H2+He
Populus	1	One	5.972e24	12,756.3	37	no	365	23	1	Ar  N2+O2
Luopium	1.52	One	6.4219e24	14,750.2	-153	no	412	9.8	2.6	CH4 H2+He

*AU, which stands for "astronomical unit", is a unit for measuring distance. One AU is the distance from the Sun's center to the Earth's center. It is equal to 149,600,000 km (93,000,000 miles).

Icarus is the closest planet to Eris.  The temperature varies from 90 to 700 degrees in the Kelvin scale that makes it impossible for life to exist.  It has one moon.

Populus is famous for the beautiful mountain ranges, the clean beaches and the fresh water lakes, which can be seen on the planet's largest and smallest continents. With different climates that make life easier to flourish, Populus has variety of wildlife.  It is roughly 12,756.3 kilometers in diameter and weighs 5.972e24 kg.  Populus is divided into three continents: Durin (the largest and most diverse), Gloen (the smallest) and Fridgenai (covered in thick glaciers).

Luopium has an extremely cold temperature of 153 degree Celsius.  Therefore it cannot support life. It also has one moon.  It is a bit heavier and bigger than Populus.  Its atmosphere is filled with Hydrogen, Methane, and Helium.

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