Angels would definately not have traveled through space. Perhaps you don’t understand what an “angel” is?
Would they travel on a ship like device? A ship that crashed in NM? A ship that gave us the the basics for transistors and kevlar and lots of other cool post 1947 inventions?
I understand what an angel is. What I don’t understand is how they relate to a crash that might or might not have happened in the desert outside Roswell in 1947.