New Horizons Finds Nitrogen Glaciers and Hazy Air on Pluto

Pluto has nitrogen glaciers flowing down from its distinctive, icy heart. And the dwarf planet's thin atmosphere may have begun to freeze out onto its surface—a change long expected, as Pluto moves farther away from the Sun, but never before seen.
Scientists with NASA's New Horizons mission unveiled the findings, and a raft of new images, at a press conference on July 24, just ten days after the spacecraft flew by Pluto. Michael Summers, a team member and planetary scientist at George Mason University in Fairfax, Virginia, said “The mass of Pluto's atmosphere has decreased by a factor of two in two years."