The main feature across all four issues was Adam Strange, the man of two worlds. Adam Strange is a human archaeologist who travels to Rann in the Alpha Centauri system by being in the right place at the right time to be hit by zeta beams, which transport him across space. On Rann, he fights evil and romances the beautiful Alanna, but once the zeta radiation in his body dissipates, he returns to Earth, meaning he can never make a home or a family on this distant world. I've read some of the modern takes on Adam, and I own the Adam Strange Silver Age Omnibus, but I haven't gotten around to reading it, so this was my first real exposure to the original adventures of Adam and Alanna.
The basic set-up of Adam Strange also has a pathos that puts it above other stories of its era: Adam has found his place, but he can never keep it, and even in just these four stories, Fox provides permutations on it so it never gets stale. Alanna is pretty awesome, too: she's not an equal co-star with Adam, but she is smart and cool, and works to get herself out of trouble as often as Adam does. These were fun, and I look forward to rereading them (with better printing) and reading the others.
- The Atomic Knights. After a nuclear apocalypse, a group of survivors uses medieval armor to battle would-be warlords. This was okay, nothing special, and a little contrived even by its own standards.
- Knights of the Galaxy. Futuristic space knights. Pretty bad, to be honest, with a weird dose of sexism.
- Space Ranger. Pretty generic stuff, with the usual Silver Age wackiness you'd expect of a subpar Legion story. (Space zoos and shit. Like if a guy can hypnotize all animals, surely he can come up with a better way to make money than this.)
- Captain Comet. I think my enjoyment of these stories (such as it was) is more due to retcons: the post-Crisis DC universe had the Golden Age heroes out of commission by the 1950s, but the Silver Age ones not in place for some time, leaving "throwforward" Captain Comet as one of Earth's only defenders in the 1950s, which gives a little frisson to the loneliness of a man born too early.
- Tommy Tomorrow. The way DC kept tweaking this character over time sounds fascinating, but going by this one story he wasn't a very skilled crimefighter. I'd love to read an omnibus of all his adventures, but it seems unlikely.
- Space Cabby. Funner than I expected.
- Star Rovers. The actual story here was poor, but I loved the basic premise of the Star Rovers: three highly competent people who meet up only to brag to each other and argue. Karel Sorenson is great; you can see why Howard Chaykin made her into a space goddess.
DC Super-Stars of Space appeared in issues #2, 4, 6, and 8 of DC Super-Stars (Apr.-Oct. 1976). The original stories were published in various comics from 1951 to 1964, and were written by Gardner Fox, John Broome, Bob Kanigher, and Otto Binder; penciled by Carmine Infantino, Murphy Anderson, Jim Mooney, Bernard Sachs, Bob Brown, and Sid Greene; and inked by Murphy Anderson, Joe Giella, Jim Mooney, Sid Greene, Bernard Sachs, and Bob Brown. The reprints were edited by E. Nelson Bridwell.