First book of 2023 finished (TBF I started it waaay before 2023…). Great to read something by an actual real life astro friend. It’s opened somewhat of a wormhole into an obsession with Henrietta Swan Leavitt, and of course was an all round great read. Excuse the lack of dust cover which is now adorned with a lovely coffee stain. Now onwards to the annual pledge to read more books… #theinvisibleuniverse #cosmology #darkmatter #darkenergy #InstituteofAstronomyCambridge #expandinguniverse