In addition to the two you mentioned, I've enjoyed 'cool worlds' by some prof. at Columbia University. He's a cosmologist (?) by trade, so lots of stuff about

In addition to the two you mentioned, I've enjoyed 'cool worlds' by some prof. at Columbia University. He's a cosmologist (?) by trade, so lots of stuff about new planet discoveries, new detection techniques/tools. And he has a very soothing voice similar to Space Time - Good winding down before bed :-) Edit: Ahh - its "David Kipping", Assistant Prof., Astronomy