A word that starts with "astro" or "cosmo"

Our answer book holds 44 answers to “A word that starts with "astro" or "cosmo"”, from the first thing anyone would say to names almost nobody would think of. Astronaut, Cosmos and Astronomy are what most people type first, so they score the least. It is a fairly short list: only 4 answers sit in the two rarest tiers, so reaching one takes real knowledge.

The headline names go fast here, so it pays to remember what was catalogued long after them. You will find it in stage 19, “Stargazers Through Time”, of the Cosmos mission. The first stages of every mission are free, and later stages come with the full mission.