Ghosts of Gol (Perry Rhodan #10)

When Perry Rhodan, interplanetary Peace Lord searches to unravel the secret of eternal life, he finds a clue from the past of Ferrol which sends him to the giant planet of the Vega System, Gol.

There, accompanied by two Arkonides, the beautiful Thora and scientist Khrest, and as ever, by his Mutant Corps, Perry explores the planet's surface.

And Gol is a monster. Not only has it a gravity far exceeding anything the humans have ever encountered, but they have to contend with an awesome army of glowing forms which attacks their ship...