BBC sky at night: Pluto and New Horizons

The other night, I watched a very informative BBC Sky at Night documentary on Youtube about the flypast of the New Horizons probe on planet/dwarf planet Pluto last year.  I didn't realize that Pluto and its moon Charon can actually qualify as a binary pair because the barycentre that they both orbit is outside of Pluto itself.  Presenter Chris Lintott really knows his stuff and is a worthwhile successor to the late Patrick Moore.