They all sound a bit tacky to me.
I'd recommend against changing it. I'm not sure any of these are a significant difference from "Explorers" in terms of being memorable, but I know from the infamous "Skyward/Skywards" type I made when I initially posted Eyes how much of a pain changing thread titles is.
What about "Entering the High Frontier"? It's not exactly "across", & "into" just doesn't do it for me. (I'm not exactly thrilled with "entering", either, actually...)
"Into the great beyond" sounds like the working title of "Highway to Heaven".![]()
TY.Archibald said:Entering the high frontier
I kind of like it.![]()