Link. Emphasis on OBSERVABLE. It’s likely the universe is far larger than what we can observe. I particularly liked that stars, in an odd way, are sparser than galaxies… ” If the Milky Way were a grapefruit in Seattle, WA, then Andromeda — the Local Group’s largest galaxy located 2.5 million kilometers away — would be a grapefruit in the same room, only about 10 feet … away” Recommend that vertical log map.