In this episode, Thor refers to the new Asgard home planet, Orilla, as being "rich in neutronium" on which both Asgard and humaniform replicator technology is based. As the term is commonly used, neutronium consists entirely of neutrons, and, if it exists, weighs somewhere around a half-billion tons per tablespoon. If neutronium existed on a planet, nothing would prevent it from sinking to the core of the world. Neutron stars, or pulsars, are believed to be solid neutrons and the densest bodies in the universe short of black holes. Since neutrons can be produced by known nuclear processes, it is far more likely that neutronium is something that would be manufactured rather than found.