Blackstar

Blackstar is a 1981 US-American cartoon from Filmation Studos. The series originally aired over CBS between 12 September and 5 December 1981.

Plot
John Blackstar is an astronaut from Earth. He's inside his spacecraft, which is swept through a black hole and crashes onto the planet of Sagar. There he asssists the Trobbits fighting against the Overlord for the Powersword and Starsword.