I thought they could also see atmospheric composition as it passes in front of the star, no? Having that info and the data you’ve just mentioned they postulate if it’s habitable or not. Obviously not seeing any detail at all about land mass shapes, but perhaps composition? I’m not a spaceologist, so I’m only musing.

Yes: PAR2

I bought into the carbon-based BluRay discs. Good for 1000 years, right? ;) I haven’t ever checked them since writing data to them.