Information-Centric Networking (ICN) is a new networking paradigm which is attracting increasing attention from the scientific community. ICN focuses on content handling and distribution rather than host-to-host communications. Satellite systems have always played a key role in content distribution and therefore, they are expected to be fundamental components of the information-centric networking. However, it is not obvious whether solutions that are being developed for terrestrial ICNs are effective in satellite scenarios as well. More specifically, focus of this paper is on in-network content caching, which is an important feature characterizing all ICN proposals but, as the authors will show, should be re-designed to address the specific characteristics of satellite networks.