It is the culmination of a momentous journey that has taken the New Horizons spacecraft 9 1/2 years and 3 billion miles of space flight to complete, tomorrow the New Horizons space craft will fly by 7,767 miles above Pluto which is the closest it will get to the surface, New Horizons will also pass by Pluto's moon Charon.
New Horizons, weighing less than 1,000 pounds including fuel, has seven instruments that will be going full force during the encounter. Pluto, which is considered a dwarf and no longer a planet. We won't be seeing what New Horizon sees on Pluto until sometime on Wednesday, when New Horizon phones home and sends images and data from the site. This is history in the making, folks.
Source: NASA