No, not the collisions, the blog!
My friend Rob Knop has joined the Science Blog collective with Galactic Interactions. He's an astronomer, and has the bona fides for it (more than I do, too; he's an actual professor and everything). If you want a taste of what he does, try this essay about gravity on for size. This is a complicated aspect of physics he's tackled, and he does it really well.
I've already added him to my blog reader, and to my blogroll.