The International Astronomical Union has finally given the Pluto moons their official names. And according to the information provided by the government, the new names have been taken from mythology.

Researchers had recently discovered fourth and fifth moons of Pluto with the help of the Hubble space telescope. The mission was run under the guidance of Mr. Mark Showalter, Senior Scientist at the Seti Institute.

With the discoveries being made in July 2011 and July 2012 respectively, now has been completed their naming ceremony with IAU making the announcement regarding their official name designations.

The fourth moon lying 15 miles across (formerly known as P4) has been named as Kerberos after a three-headed dog of ancient Greek legend. On the other hand, the fifth moon lying at 20 miles (formerly known as P5) has been named as Styx, after a mythological river that separates living from the dead.

Experts ran an international public vote in which both the names were ranked at second and third position respectively.

"I was overwhelmed by the public response to the naming campaign," Dr. Showalter said.

Both the names after scoring almost top in the public vote were formally approved by the International Astronomical Union.