This new image obtained courtesy of NASA on July 16, 2015 of an area on Pluto's largest moon Charon, shows a captivating feature -- a depression with a peak in the middle, shown here in the upper left corner of the inset.

Professor Stephen Hawking hails the team behind NASA's New Horizons mission to Pluto.

NASA says New Horizons spacecraft is nearly 10 days away from Pluto.