Well, that's the thing. We do got some sunlight - but even inside, the star in this system is sendin' out invisible radiation all the time. Visible light only makes up a part of it.

Now - it's hard to tell, but the planet below has got water, so there's probably a magnetic field around it - and hopefully, that means, around us, too - so that'll keep some of the worst of the radiation out. Think of it - uh - like an invisible shield, that envelops the planet in almost a tear-drop shape.

[ He paused, looked a little helpless. ]

I don't know how to explain it in a way that'll make sense. But generally speakin', shieldin' is the most important. Water's the best, and most stations or ships will have a room in 'em that's got thick lead walls or surrounded by a water tank, for solar flares. That's when a star kicks up a lot more energy than it would otherwise. You can actually see 'em, with a good enough telescope.