Lyric discussion by DouglasNC 

Such a fantastic song, one of my favorites. A Brian May composition which is a bit of a departure from the power progressive style of Queen. It's a science fiction tale which brilliantly employs a part of Einsteins theory of Relativity, time dilation. Meaning as speed increases time expands; a week becomes a month, a month becomes a year, etc. It tells a story of a group of space voyagers (the volunteers), who in the year of 39 (could be 2239, 2339, who knows) depart a dying Earth in a space ship to explore a distant world for habitability. Presumably a government project, essentially scouting the planet for colonization. If they were to travel at speeds approaching the speed of light then the effects of time dilation would dramatically reduce the rate at which they age. A year back on Earth could mean only a day to them physiologically. If you follow the words you can piece together it took the volunteers 100 years to complete the mission, returning to Earth exactly one century later (in the year of 39 came a ship in from the blue). It's the year of 39.... in the next century.

Upon their return they discover the world they left no longer exists. They have been gone a century yet the effects of time dilation has aged them only a year. Their families are long dead, the Earth has deteriorated to a gray planet. They came back to report the world they explored is vibrant and perfect for humanity. But their good news is quickly squashed by the realization that they are now refugees in time.

The song seems to have a dual narrative; a third person perspective telling the tale of the voyage and their return underlying a first person conversation. "Can't you hear me calling you, though you're many years away?" is an imaginary conversation between one of the volunteers and presumably his wife, speaking to her through space and time. "write your letters in the sand", to me, seems to suggest leaving him a message etched in the earth he will see when he returns, perhaps a tree or stone. "for the day I take your hand in the land that our grandchildren knew." is simply a longing to return to the time and place with his loved ones. A land he knows his grandchildren will inhabit in his absence.

I think the line "your mother's eyes from your eyes cry to me." suggest the voyager has met one of his children. After so long it has to be assumed his child is now a centenarian. And he is still a young man.

"For my life's still ahead, pity me." means he is now alone and will live out the rest of his life displaced in time with no one.

Lyrically the song does not give you all the information you would need to assemble the events or meaning of those events. It only gives you enough to put together a long voyage and it's effects physically and psychologically. What I love is the way it's intentionally framed as a sea voyage to a new land, not as a journey into space. Unless you knew "though I'm older but a year" meant a very specific phenomena of intergalactic travel, you would be confused by that. But that is precisely what it is, and Mays knew enough about astrophysics to use it as the basis for a sad tale of loss.

@DouglasNC Brilliant interpretation!

@DouglasNC Awesome write up. FWIW, I think "write your letters in the sand" refers to the sands of time.

@DouglasNC You're a brilliant bastard

An error occured.