This link goes direct to that song track - generic is all they mask with, it seems.
Almost a “sea shanty”, maybe? But from a top-list of sci-fi theme songs (don’t think this was one). Anyway -
Per wiki:
The song relates the tale of a group of space explorers who embark on what is, from their perspective, a year-long voyage. Upon their return, however, they realize that, due to the effects of time dilation from traveling at relativistic speeds, a hundred years have passed on Earth, and the loved ones they left behind are now all dead or aged.
(Apparently Brian May of Queen has his PhD in this! Thesis: A Survey of Radial Velocities in the Zodiacal Dust Cloud. Yeehaw, rock and roll!)
I saw these guys when in High School, Madison Square Garden - great seats, amazing seats… a time when “Fat Bottom Girls” could be a top radio play, R&R-pop song! ; ) omg. I never saw them do another show like that one.