adjective
astral
Relating to stars or outer space.
The viewing circle frames an astral scene of distant stars.

Etymology
Latin astrum means star, and the ending makes an adjective. Astral describes things belonging to the stars or, more broadly, the space in which they are found.
More examples
- The poem is filled with astral imagery.
- An astral map covers the observatory's ceiling.
- The painting combines earthly landscapes with astral forms.