Amalthea

Here is the illo for Eclipse Phase book by Catalyst game labs and Posthuman Studios, LLC (c)
here is the quotation for RobBoyle's blog
"This piece from Viktor Titov depicts the interior of a "Reagan cylinder." In Eclipse Phase, Reagan cylinders are a variant of O'Neill cylinder habitats -- essentially tube-shaped spaces carved out inside asteroids that are spun for gravity. They are used exclusively by the Jovian Republic, where the rocky shell of the hab protects the residents from Jupiter's dangerous radiation."