Marvel Super-Heroes (1967 series) #18

It is the year 3007, and the ruthless reptilian Badoon empire has swept across the solar system, enslaving the human colonies on Earth, Jupiter, and Pluto. Charlie-27, a fifth-generation Jovian soldier built with eleven times the mass and three times the gravity resistance of an ordinary human, returns home from six months of space militia duty only to find Jupiter completely overrun. He fights off Badoon patrols, discovers his father has been taken to a labor camp where prisoners are being worked to death mining radioactive harkovite, and barely escapes through a teleportation station, arriving on the frozen world of Pluto. 

There he encounters Martinex, a crystalline being whose body can generate extreme heat or cold, who has stayed behind on the evacuated planet to sabotage Badoon industrial complexes. Together they use robot servants and their combined abilities to fight their way back through the teleport system to Earth. 

Meanwhile, on occupied Earth, the Badoon commander Drang is interrogating Major Vance Astro, the first human ever to travel to the stars. Astro left Earth in 1988, his blood replaced with preservative fluid to survive a thousand-year journey in suspended animation, only to wake up and find that faster-than-light travel had been discovered two hundred years after his departure, making his sacrifice pointless. Forced to wear a copper foil suit forever to prevent instant aging, Astro is now a prisoner of the Badoon, who want to exploit his unique knowledge and psychic energy powers. 

Also in captivity is Yondu, a blue-skinned native of the planet Astro originally landed on, who wields a sound-sensitive arrow he controls through whistling. When the Badoon try to force Astro to execute Yondu, the two instead stage a dramatic escape, using Yondu's arrow and Astro's psychic powers to fight their way out. 

All four fugitives converge on an Earth teleport station, battle their way through Badoon guards, and unite for the first time. Learning that New New York has been devastated and that no free human colony seems to remain, the four vow to keep searching and fighting, calling themselves the Guardians of the Galaxy.