This is the 4753rd most frequent Swedish word.
astra
"Astra" is not a standard Swedish word but may refer to "star" in poetic or literary contexts, derived from Latin.
Here, 'Astra' is used as a proper noun, perhaps the name of a book.
Jag har en bok med titeln 'Astra'.
I have a book titled 'Astra'.
In this context, 'Astra' might refer to a mythical or celestial entity, aligning with its usage in folklore.
De gamla sagorna talar om Astra på himlen.
The old tales speak of Astra in the sky.
Here, 'astrorna' derives from 'astra', referring to stars, demonstrating its usage in a plural form related to astronomy or astrology.