Corazon de Fuega
Vieron is a young F9 star, a hot yellow-white giant with ten planets in its retinue. Of these, Corazon de Fuega (‘Heart of Fire") is the only one that humans can inhabit. Corazon (G4/R2/A3/P4/H3) is a massive, metal-rich world over six times the mass of Earth. Its average surface gravity is a crushing 4.4 g, requiring gravity generators in human colonies and significant genetic or cybernetic engineering for any long-term residents who must venture out of the colony’s protection. In most outposts, the gravity generators are set to about 2.8 g. Acclimatized to this level of gravity, the Vieronites are able to move about carefully outside their gravity-damping fields, while visitors from standard-g worlds are completely immobilized.
Like many young worlds, Corazon’s rotation is very fast (its day is only about five hours in length). Combined with its dense atmosphere and volcanic outgassing, this leads to an extremely turbulent and dusty atmosphere. Corazon’s winds often reach 200 to 250 kph. Despite these formidable conditions, Corazon de Fuega harbors the beginnings of complex Series I life; prim¬itive plants and one-celled animals thrive in its steaming seas and tortured landscapes. The air is undergoing conversion; the current oxygen content is about 10%, not quite suitable for hu¬mans. In a few hundred thousand years (without terraforming), humans should be able to breathe Corazon’s air without assistance.