Pluto's changes as it makes its closest approach? I've seen the photos from Hubble showing the seasonal color changes on Pluto. Just wondering if the addition of the extra atmosphere as it makes its closest approach to sun, has changed the any of the colors on Pluto, in particular the black spot next to the bright spot? How often do we get photos of Pluto from Hubble? Daily? Weekly? Monthly? Help I'm ignorant in that area!