Traveller reminded me strongly of Star Wars in that it had a very grungy, dieselpunk vibe. (I assume the resemblance is intentional.) Rarely do the PCs get to see, let alone use, gear that is new and clean. Ships, droids, and weapons are all decades old and badly worn, unless they're on a military flagship or a glittering sector capital world.
Furthermore the campaign setting is relatively low tech. Computers are present but don't have a huge impact. Jump drives and antigravity are the only really fantastic elements. AIs, cybernetics, and robots are extremely rare. Starship combat is relatively "hard", as ships maneuver using vector mechanics, and weaponry is mostly limited to plausible directed energy weapons and missiles.
PCs are definitely at the heroic, not superheroic or even Dark Champions level. No powers unless you're an alien, and low AP even then.