I have no experience with this specific setting, but I've played SW quite a bit. I think it would be pretty straightforward to adapt it to FATE, and with a little extra effort but a better result to Cortex Prime.
If you're open to branching into other systems, the folks at !scifi@ttrpg.network can help you pick an easy to learn and vibe appropriate system for your adventure.
I messed up a bit. Kosmic is their brand of Cepheus, basically the rules. The setting is called Solis people of the Sun.
This is the blurb:
This Book contains accurate star maps to 15 parsecs around the Earth. With 30 star maps detailing 521 star systems, plus 31 planetary maps, and expanded star systems.
This is us, the Sideralis, and Solis People of the Sol system, Humans. The date 2271, and it is a new day with new people, the future is unwritten. [...]
Traveller is half the galaxy, millennia into the future. Solis is a couple hundred years from now, and a much smaller chunk of the galaxy. It's a different vibe.
Hostile is the retro-future, like the Alien films, Outland, etc.
There isn't a default Cepheus setting. It came to be after Mongoose changed licensing terms for Traveller. So Cepheus is a fork of the OGL content for MgT1. A lot of third party publishers had material for that, and pivoted to Cepheus to continue their line.
Kosmic is A Cepheus setting (not The), but you can also have Hostile and Orbital from Zozer, etc. Just search for Cepheus on DTRPG and you'll find plenty. They each have their own twist, so read their elevator pitch.
Not really, no, just full fledged settings with rules. Trying to keep a concise list. You're welcome to start a post for those, though. It would definitely fit the community.
Zozer Games has a few solo Traveller books that are well regarded.
There's one aptly named Solo for general traveller adventures, there's Hostile Solo for an Alien / Aliens feel and some really cool squad mechanics. I think there's a third supplement, but I'm not sure.
Edit: aha! The third book! Classic Traveller style, I'm guessing by the price there's minimal artwork.
Thanks!