EPOD is a pretty cool site, with a different shot of some Earth sciencey thing every day (duh). I keep it in my RSS feed reader along with several other such sites; besides providing beautiful pictures, there’s always some science nugget there I didn’t know about before.
If I weren’t an astronomer, I’d be a geologist or meteorologist. I love both those fields! Of course, both are related to astronomy; the former due to planetary physics (and asteroid/comet impacts), and the latter because it’s hard to observe unless it’s clear (or you’re a radio or space astronomer).
Looking up, looking down… it’s all related. It’s science, and it’s cool.