Uranus may have two more tiny moons in addition to the 27 we already know about, according to astronomers.
The two moons are said to possibly cause the fluctuations in the density of Uranus' two dark rings, seen in the 1986 flyby conducted by the Voyager 2 spacecraft.
Astronomers Robert Chancia and Matthew Hedman from the University of Idaho in Moscow announced the news online at arXiv.org.
They reported that the moons would be between 4 to 14 kilometres wide and would not have been clearly visible in the Voyager 2 images.
Chancia and Hedman believe more research can be done on the two moons with observations from telescopes.