Today is an historic day in space exploration. After a nine-year, three-billion-mile journey to the outer edge of our solar system, NASA’s unmanned New Horizons spacecraft has reached Pluto. This makes the U.S. the first country to send spacecraft to every planet in our solar system.
These images of Pluto and its largest moon, Charon, were captured in the days leading up to New Horizons closest approach. Data and images gathered over the next weeks and months will reveal more about these bodies than has ever been known before.