Difference engine No. 2

Today my better half had to go to the Consulate in London to get some papers witnessed, so as a last minute I took the day off as well.

Once the paper was completed we went into the near by Natural History Museum - which we always find very disappointing and then went into the the Science Museum next door, which is much better, and today's blip is the recently completed Difference Engine No. 2 (sorry about the reflections on the glass). The extra is from the Natural History Museum, though what a dinosaur has to do with planets I'm not sure...