At NASA they do not have a single or “main” blog for the agency, but they have many blogs managed by staff. Jason Townsend, Deputy Social Media Manager, states that their strategy is “to enable the ease of sharing content through a centralblogs.nasa.gov site but with a myriad of authors and voices covering a wide range of topics.”
Read more: http://www.digitalgov.gov/2016/01/15/state-of-federal-blogging-2016/