Following up on a discussion I had had earlier in the day, I thought it might interest Bobby to see that all the other major planets of the Solar System when lined up, diameter to diameter, can fit within the Earth-lunar orbit. I'm going to use this as a springboard to start collecting hard facts on the planets, and expanding on the model Solar System in the school corridor. We concluded with Bobby's favorite activity: browsing through the archives of Astronomy Picture of the Day in search of images of galaxies and other cool objects. Today, Bobby discovered the nucleus of the active galaxy Centaurus A, a very cool object indeed.