We already have a hymn for the Space Force, or parts of it. It just has to be finished.
https://en.wikipedia.org/wiki/The_Green_Hills_of_Earth
The arching sky is calling / Spacemen back to their trade. / All hands! Stand by! Free falling! / And the lights below us fade. / Out ride the sons of Terra, / Far drives the thundering jet, / Up leaps the race of Earthmen / Out, far, and onward yet
We pray for one last landing/ On the globe that gave us birth/ Let us rest our eyes on the fleecy skies/ And the cool, green hills of Earth.