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.

αἰεί φανεροί ἀστέρες‘ever-visible stars’

Greek

References: Alm. Heiberg: I.3, 10:21
Translated into:
Arabic: النجوم الأبديّة الظهور [Alm. MS Leiden: I.3:31, f. 3v:6. – Alm. MS Tunis: I.3:31, f. 2v:23-24]
Modern translations:
English: ever-visible stars [Alm. Toomer: 38]