YES.
Astra is the Latin word for star. That is where the first part of the words astronomy and astrology comes from.
Astra
Either works - depending on the emphasis you want to use. The word you want to emphasize comes first.
The word "Astra" is derived from the Greek word "ἀστήρ" (astēr), meaning "star." It is often used in various contexts related to stars or celestial bodies. In Latin, "astra" is the plural form of "astrum," which also means "star." Therefore, while its roots are Greek, it has been adopted and used in Latin as well.
Ad astra per aspera is the Latin equivalent of 'To the stars at all costs'. In the word by word translation, the preposition 'ad' means 'to'. The noun 'astra', in the accusative case, means 'the stars'. The preposition 'per' means 'by, through'. The noun 'aspera', in the accusative case, means 'roughnesses, rough places'.
Latin, Ad astra per aspera. A difficult (or, rough) road leads to the stars.
Astra.
Through difficulties and stars.
As the word suggests, one popular theory for the reason for disasters was Astrology. The stars (Latin: astra) were wrong, and so bad things happened. The word "disaster" comes from dis+astra.
There are three well known pieces of literature that uses the phrase 'ad Astra per aspera.' It was used in Hermann Hesse's Beneath the Wheel, Harper Lee's To Kill a Mockingbird and James Joyce's A Portrait of the Artists as a Young Man.
Astronaut, like Cosmonaut, has a Greek root not a Latin one. It derives from the words Astro (Star) and Nautes (Sailor).
The Latin plural noun meaning "stars" is stellae, astra or sideria.