Does anyone know how many moons Pluto has?

With the announcement today, 4 if you count Charon as a moon and not part of a double planet system.

June 28th 2011 a photograph taken by the Hubble Telescope revealed a fourth moon of the planet Pluto and this discovery was confirmed on July 11th and the announcement was made by NASA today, July 20th.

Currently the newly discovered moon of the planet Pluto has no name but is referred to as 'P-4'.

The other moon's of the planet Pluto are Charon, the largest discovered in 1978 and Hydra and Nix.

'P-4' orbits between Hydra and Nix.

Pluto has 4 moons. The first one was Charon which was discovered in 1978 and is about half the size of Pluto making it almost a double-planetary system. There is also Hydro and Nix which were both discovered in 2005 by the Hubble Space Telescope and the new one named temporarily "P-4"in about mid 2011. P-4 was discovered accidentally by the Hubble Space Telescope when it was looking to see if rings are around the dwarf planet Pluto. The moon P-4 is by far the smallest of Pluto's 4 known moons.

P-4 is located between the orbits of Hydro and Nix (which are between 20 to 70 miles in diameter or 32 to 113 km). P-4 is estimated to be 8 to 21 miles in diameter or 13 to 34 km in diameter. Charon is by far the biggest moon being 648 miles or 1,043 km in diameter. Pluto itself is about 1,200 miles in diameter. Due to Pluto's and Charon's size they are sometimes considered a double-planetary system. Charon is the biggest known moon when compared to the planet or object it orbits. Charon is about half the size of Pluto while the Moon is 1/4th the size of the Earth.

Here is a few articles about it:

http://blog.seattlepi.com/thebigblog/2011/07/20/pl...

http://www.ibtimes.com/articles/183671/20110720/na...

Well, ..., as of today's announcement there are 4 moons (Charon, Nix, Hydra, and the newly discovered P4). See the article below.

16

They just found another one.