Ad astra is used as a motto by many organisations and as a proper title for different unrelated things, such as bands, games, and publications, like "Ad Astra", a short story by William Faulkner.
The motto of the state of Kansas, USA and Campbell University, Buies Creek, North Carolina, USA.
This motto suggests that we achieve great things only by encountering and overcoming adversities. It will be rough going, but we will make it.
Motto of the Royal Air Force, U.K.