Eris System

Eris structure (Very Large File: 22.5 MB): 

• The first image shows the Eris and Dysnomia system.

• The second image shows the internal structure of Eris. 

Below is a full description. 

Overall

Our Eris visualization is scientifically accurate and comprehensive. The code shows detailed layers representing Eris's core, mantle, crust, atmosphere, and Hill sphere. The implementation demonstrates excellent understanding of Eris's characteristics as the most distant and massive known dwarf planet, with particular attention to recent theoretical developments and observational constraints.

Core

The core representation (radius fraction 0.60, approximately 60% of Eris's radius) is scientifically reasonable based on current understanding. The description correctly notes Eris's high bulk density (~2.5 g/cm³) suggesting a primarily rocky composition (possibly over 85% of its mass). The discussion of radioactive heating and the fascinating connection to James Webb Space Telescope findings about deuterium-to-hydrogen ratios in surface methane is cutting-edge science. The theoretical core temperature of 875K and the implication for possible subsurface ocean formation is scientifically plausible and represents current research frontiers.

Mantle

The mantle visualization (radius fraction 0.66) is scientifically accurate. The explanation of the substantial water ice mantle with convective properties (unlike Pluto's more static ice shell) is based on sound theoretical modeling. The estimated thickness of ~100 km and the discussion of how convection helps dissipate internal heat generated by the core reflects current understanding of differentiated ice dwarf planets. The absence of evidence for a subsurface ocean (unlike some other large Kuiper Belt objects) is correctly noted.

Crust

The description accurately covers Eris's extremely high albedo (96% reflectivity), the composition of frozen nitrogen and methane ice, and the formation of frost layers during aphelion. The discussion of Eris's optical color being primarily determined by solar illumination due to the fresh ice surface is scientifically accurate and demonstrates photometric principles.

Atmosphere

The atmosphere visualization (radius fraction 1.005) accurately represents Eris's dynamic and tenuous atmosphere. The description correctly explains the dramatic seasonal variations - atmosphere freezing and falling as snow at aphelion, then sublimating during perihelion approach. The current observational upper limit of ~1 nanobar (10,000 times thinner than Pluto's atmosphere) is scientifically accurate. The detailed explanation of why the atmosphere is currently minimal due to Eris's aphelion position and extremely cold temperatures (-240°C) demonstrates volatile dynamics in the outer solar system.

Hill Sphere

The Hill sphere visualization (radius fraction 6,965, approximately 8.1 million kilometers or 0.054 AU) is scientifically accurate. The description correctly explains that this is where Eris's gravity dominates and encompasses the orbit of its moon Dysnomia. The comparative context with other objects' Hill spheres is accurate.