NASA's probe, New Horizons, has passed Neptune on its journey to Pluto and Charon and on to the Keiper Belt. Neptune and Pluto are hanging out pretty close to each other these days, so it will only take about a year for Horizons to reach the pale cold world on the edge of our Solar System. Sometime next summer.
Once at Pluto she'll begin sending back the first high rez images of that planet, though it will take several days for the data to get from her onboard computers to us. Once done, she'll reveal a world we've never seen. Very cool . . . .