Ad astra is a Latin phrase meaning "to the stars". The phrase has origins with Virgil, who wrote sic itur ad astra ("thus one journeys to the stars", from Aeneid book IX, line 641, spoken by Apollo to Aeneas's young son Iulus) and opta ardua pennis astra sequi, ("desire to pursue the high (or hard to reach) stars on wings" book XII, lines 892–893, spoken by Aeneas to his foe Turnus in their combat). Another origin is Seneca the Younger, who wrote non est ad astra mollis e terris via ("there is no easy way from the earth to the stars", Hercules Furens, line 437, spoken by Megara, Hercules' wife).
It is used as, or as part of, the motto of many organizations, most prominently, many air forces. It has also been adopted as a proper name for various unrelated things (publications, bands, games, etc.). It also sees general use as a popular Latin tag.
"to the stars on the wings of the faithful ones"
"to the stars on the wings of a pig"
"to the stars through difficulties" or commonly translated "a rough road leads to the stars"
"not for money, for discovering knowledge, approach the heavens"
"through struggle (or adversity) to the stars" or sometimes even "a rough road leads to the stars"
"Through hardships to the stars", "A rough road leads to the stars" or "To the stars through difficulties". Used by various organizations and groups.
"Through boldness to the stars"
"from grass to the stars"
"speedily to the stars"
"thus one goes to the stars"
"such is the pathway to the stars"
"a path to the stars"
"reach for the stars"