If you see placement of the five moons of Pluto then you will notice that they are formed like a miniature planetary system. Researchers have termed this type of formation to be quite unique.

In 1978, Pluto’s largest moon, Charon, was discovered. Charon is quite huge in size, around one-ninth the mass of Pluto. In fact, it is so large that the center of mass of two lies outside Pluto, which often makes some planetary scientists to consider Pluto and Charon as double planet.

In images taken by the Hubble Space Telescope in 2005, two smaller moons of Pluto, Nix and Hydra, were discovered. After six years, another moon, Kerberos, was discovered between the orbits of Nix and Hydra. After a year, astronomers announced the fifth moon, Styx.

Lately, Mark R. Showalter of the SETI Institute in Mountain View, California, and Douglas P. Hamilton of the University of Maryland calculated the orbits of the four smaller moon of Pluto and they were surprised with their findings.

To reach at the below given result, the researchers have assessed the Hubble images taken from 2005 to 2012.

Firstly, Nix was found to be rotating chaotically. “Nix can flip its entire pole. It could actually be possible to spend a day on Nix in which the sun rises in the east and sets in the north. It is almost random looking in the way it rotates”, said Showalter.

Probably, Styx and Kerberos are also rotating chaotically. Showalter said that it is just the fact that they were not been able to exactly measure them. Hydra, which is the farthest from Pluto, is tumbling chaotically.