PAL

Ptolemaeus Arabus et Latinus

_ (the underscore) is the placeholder for exactly one character.
% (the percent sign) is the placeholder for no, one or more than one character.
%% (two percent signs) is the placeholder for no, one or more than one character, but not for blank space (so that a search ends at word boundaries).

At the beginning and at the end, these placeholders are superfluous.

heavens ‘heavens’

English

References: Alm. Toomer: 37; 38; 43
Translation of:
Greek: οὐράνια [Alm. Heiberg: I.6, 20:3]
Greek: οὐρανός [Alm. Heiberg: I.2, 8:20, 9:18]