Robert Lea is a science journalist in the U.K. whose articles have been published in Physics World, New Scientist, Astronomy Magazine, All About Space, Newsweek and ZME Science. He also writes about science communication for Elsevier and the European Journal of Physics. Rob holds a bachelor of science degree in physics and astronomy from the U.K.’s Open University. Follow him on Twitter @sciencef1rst.
Scientists have found 83 moons to date around the ringed gas giant, the second-largest planet in the solar system. However, astronomers have also found tons of rocks down to about 2 miles wide around Saturn without yet tracking the objects precisely, according to. As instruments become capable of studying these smaller moons, Jupiter may have to relinquish its new title back to Saturn. Scott Sheppard, an astronomer at the Carnegie Institute for Science in Washington, D.C.
The nine particularly distant moons also have retrograde orbits, meaning that they circle the gas giant in the opposite direction of its rotation; the inner Jovian moons, in contrast, have"prograde" orbits in the same direction as the planet's rotation. The new moons' retrograde orbits imply that Jupiter's immense gravitational influence may have captured these moons, with the smaller ones possibly the remains of larger bodies broken apart by collisions.
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