Even astronauts get the blues. We're more prone to it actually. As a species, we can adapt to nearly anything as our baseline after all, even mind short-circuiting awe. And those of us lucky enough to be out here, we tend to be a little bit brighter, a little bit more disciplined, a lot better educated. We still need to understand the math, know the physics to navigate, the engineering to save ourselves out here. Can't drop by the store, after all, for the latest in parts plans if we need to build a replacement anything.
But all that means, as a group, we tend to want more stimulation, more things to see and do and think about, not less. And once you're out here, between the stars, prepping to explore the next star system on the survey plan, there's not that much. Just the science locked inside your own head, the tools you could cram on the ship, the ones you convinced the powers that be are worth dragging out of the gravity well, and your fellow travelers. There's never all that many of us; the permutations of social interaction tend to run out sooner rather than later.
It's why the first day of planetary orbit is like a holiday, a scientist’s holiday where we break out all the big toys, try everything to figure out which will tell us the most for this planetfall. This one, it looks like all the toys are going to stay out of the closet. Advanced enough that we’ll pick up info on every spectrum, still inward facing enough that we can approach close enough for solar power to supplement the ship drives and keep it all running simultaneously.
It's a pretty planet, the third one in this system, where all the emissions are coming from. Roughly 70/30 ocean to land, although judging by the night side they use the land. Maybe the follow up team can strike a treaty, they can't be using all of that ocean can they?