Sunshine is one of my favorite blogs. It was started for a new sci-fi movie coming out called Sunshine and as a result, is all about the sun and the solar system.
From asking people about what "sun" songs they liked, to interesting trivia, it's never short on great posts but this one *almost* made me get out of the office.
To quote: Doing a Solar System walk is a seriously, seriously cool thing to do, especially with kids… but whenever I’ve done it with adults they’ve all been completely blown away by it, even more than the kids. Unless you do something like this you have no concept of just how huge the solar system really is.