Carnival of Space #403

Back in the days before Tumblr and facebook and twitter, people wrote blogs, read other blogs, and collate series of posts about common themes into link compilations called "Carnivals."  These days, most carnivals have dies out, due to the death of independent blogging, the loss of attention span to microsocial, and the increasing automation of trend formation.  But a few still live on, and one of them is the Carnival of Space.  Here is number 403.