This is visually shorter:
=TRIM(RIGHT(SUBSTITUTE(A1," ",REPT(" ",LEN(A1))),LEN(A1)))
though this, despite being longer, may actually calculate more quickly:
=RIGHT(A1,LEN(A1)-FIND("ζ",SUBSTITUTE(A1," ","ζ",LEN(A1)-LEN(SUBSTITUTE(A1," ","")))))
Regards