A bright highlight on Pluto indicates that it might have a smoothly reflecting surface layer. A detailed analysis of the HST image also suggests that there is a bright area parallel to the equator of Pluto. However, subsequent observations are needed to confirm that this feature is real. These images, which were made in blue light, show that Pluto is an unusually complex object, with more large-scale contrast than any planet, except Earth. The two smaller inset pictures at the top are actual images from Hubble.
North is up.
Opposite hemispheres of Pluto are seen in these two views. The image of Pluto is based upon Hubble observations taken of Pluto in June and July of 1994. The Charon image is based upon photometric measurements acquired by Marc Buie of Lowell Observatory. This is the first image-based surface map of the solar system's most remote planet, Pluto. The brightness variations in this map may be due to topographic features such as basins and fresh impact craters.