What does Astra mean?
From Latin 'astra', the plural of 'astrum' ('star'), itself from Greek 'astron'. It evokes the phrase 'ad astra' ('to the stars').
What does Oriana mean?
Etymology is disputed: commonly linked to Latin 'aurum' (gold), giving 'golden', but equally attributed to Latin 'oriri' / 'oriens' (to rise, dawn), giving 'dawn' or 'sunrise' — often glossed 'golden dawn'. A possible Iberian/Basque origin is also proposed. Flagged as uncertain; the gold reading is one of several.