Neptune DOES have moons.
More Info: Neptune has thirteen moons–Triton, Nereid, Naiad, Thalassa, Despina, Galatea, Larissa, Proteus, Halimede, Psamathe, Loamedeia, Sao, and Neso. Neptune was discovered by Urbain Le Verrier, Johann Galle and John Couch Adams on September 23, 1846, and since its discovery, it has only orbited the sun once in 2011. Neptune takes 165 years to orbit the sun. The next time it completes its orbit will be the year 2176.
Triton Neptune’s Largest Moon
Triton, the largest of Neptune’s thirteen moons, was discovered on October 10, 1846, just after Neptune’s initial discovery. Neptune was named for the roman god of the sea, and its moons have been named for other sea gods and sea nymphs.
Additional Moons Discovered
Nereid was discovered in 1949 by Gerard P. Kuiper. Six additional moons were discovered during space exploration in 1989. It was not until 2002 and 2003 that all thirteen moons were finally discovered. The last of the moons were found with ground telescopes. Neso and Psamathe are two moons that are millions of kilometers away from Neptune and still gravitate around the planet. No other moon in our solar system orbits its planet at such a great distance.
*All info can be obtained from the first source so did not inline cite.
“Solar System Exploration: Planets: Neptune: Overview.” NASA Solar System Exploration: Planets: Neptune: Overview. N.p., n.d. Web. 09 Jan. 2013. <http://solarsystem.nasa.gov/planets/profile.cfm?Object=Neptune>.
“Solar System Exploration: : Planets.” Solar System Exploration: : Planets. N.p., n.d. Web. 09 Jan. 2013. <http://solarsystem.nasa.gov/planets/profile.cfm?Object=Neptune>. (orbited in 2011)
“Planetary Names: Neptune.” United States Geological Survey. N.p., n.d. Web. 09 Jan. 2013. <http://planetarynames.wr.usgs.gov/?System=Neptune>.