You are in The Observatory.
Ground you have walked is named. The rest is drawn but unnamed — it is waiting, not missing, and nothing is required of you to find it.
Every realm is named here, and its rooms fold open beneath it. The mark beside a name says which ground you have already walked.
Every door stays where you left it. Esc folds the map.
The pair 'label-weight', a molecule presenting inside 2 organism name(s) on the library shelf; atoms: label, weight.