R.A.F Motto!? Whats it mean?

[OSEU]

What is the Royal Air Force motto? I mean the Great British R.A.F not any of those ex-colonies who still use 'Royal' lol

Can anyone translate "Per Ardua ad Astra" !?!?

Is confusing me lol

 

[sunb!]

Translation

Per Ardua ad Astra means "Through Struggle To The Stars" which also is the RAF motto

Url: http://www.raf.mod.uk/info/



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Per Qualitatem Optimum Robur