There's one breadcrumb trail that I came across in the summer (of course it had already been solved long before I stumbled over it!) and that was the case of the missing pilot Luca Rekivek, an explorer who's wife reported that he'd found something significant when out exploring.
It was reported in a Herald story in the local news at Obsidian Orbital in Maia. If you go there, you can still find it as a "pinned" story, so you won't have to search through more recent items to locate it.
Near the station is a listening post that appeared around the same time. Heading there and scanning it reveals further information.
I won't say more than that here, but you can follow the clues to try and find Luca and what he may have found.
The cannon site has a write up of it
here though for anyone who wants all of the spoilers...
I didn't get too far into it at the time, but depending upon the next CGs I might pick up where I left off and see if I can discover his fate...