Wednesday, October 21, 2015
Today's Astronomy Picture of the Day shows the northern region of Saturn's ice-moon Enceladus, courtesy of the hard-working Cassini orbiter. It is interesting to put this image alongside the images from New Horizon's visit to Pluto. Dwarf planets and moons showing more complexity than we ever thought possible. New headaches for the IAU and it's attempt to neatly label everything!