Neptune is the eighth and final planet in the solar system. No, I haven't forgotten about Pluto! Pluto is currently classified as a dwarf planet. Did you know that sometimes Pluto is closer to the sun than Neptune? Neptune was the first planet to be discovered with math, and was the final objective of the Voyager 2 probe, which visited it in 1989. Like this video if you want to see more videos about SPACE! Subscribe to FreeSchool: https://www.youtube.com/user/watchfreeschool?sub_confirmation