Obelix

Obelix is the biggest Hyperterrestrial (Terrestrial Planets larger than 8 Earth Masses) Planet. It is a largely unexplored planet. It has a mass slightly larger than Jupiter and its radius is slightly larger than Uranus's.

Hyperterrestrial Planets
The first Hyperterrestrial Planets were theorised in 2020 as many neptune-sized planets with high densities were discovered, being much denser than Earth. These differ from Chthonian planets as they weren't gas gaints in the past anyway. They are formed on the protoplanetary disc where there are low amounts of hydrogen and helium, but the particle counts are extremely high.

Habitability
Obelix contains brown soil, much like Earth. The haze of the atmosphere is light blue, as it is about 40% Oxygen and 60% Nitrogen. It has water oceans and some plants like bushes that can be seen from space. Trees are rare on the planet due to the high gravity. small animals appear but nothing above the size of a pig. The oceans have a slightly greener colour as there is diverse life underwater.

Internal Structure
The internal structure of Obelix is unknown, but one theory is that there is the crust, and then a thicker outer mantle like Earth's, then there is a liquid middle mantle of iron, and then a inner mantle of iron. Further down are more radioactive elements which have pressures too great to become gasses which escape and go upwards. There is very likely to be exotic and rare compounds that have much stronger properties than diamonds. This was also theorisised to also happen in Black Dwarfs, but the atmospheres are different and no Black Dwarfs exist yet.

Star
The star that Obelix orbits is Asterix, which is a star similar to the Sun's. Obelix lies outside the habitable zone, but the radioactive elements in the core heat up the planet to about 22 Degrees Celsius. Obelix has no moons.

Exoploration
The planet was discovered in 2156, and is 1557 light years away from Earth, it was a Planetary Target when warp speed was created, but so far only a rover, an ocean explorer and a probe have reached the planet due to humans avoiding it since it cannot sustain human life because of the gravity.