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A little interesting about space life.
The chaotic rotation of the moons was not the only surprise that came from the study. HST's monitoring also showed a link between the orbits of the three moons Hydra, Nix, and Styx.
and here is another
The Cassini-Huygens mission is a collaborative NASA/European Space Agency/Italian Space Agency robotic spacecraft that is observing the Saturn system. The spacecraft was initially constructed to sport two components: One is the European Space Agency-designed Huygens Probe named in honor of the Dutch mathematician and astronomer Christiaan Huygens (1629-1695), who discovered Titan. Huygens also studied the rings of Saturn. The second component, the NASA-designed Cassini Orbiter, was named for the Italian-French astronomer Giovanni Dominico Cassini (1625-1712) who discovered four of Saturn's other moons. After a long, difficult journey through interplanetary space, that took it from Earth to Saturn, Cassini-Huygens finally reached the realm of the ringed planet on July 1, 2004. On December 25, 2004, the Huygens Probe was deliberately severed from the Cassini Orbiter, and began its descent down to the long-veiled and hidden surface of Titan--sending back, to waiting astronomers on Earth, an abundance of valuable information about the mysterious moon-world. Titan, at last, had its hidden face unveiled--revealing its well-kept secrets. The mission will continue until 2017.
Now we know that there are over 100 moons circling the eight major planets of our Sun's family. The majority of our Solar System's moons are icy, small, and frozen worlds that contain only small quantities of rocky material. The distant multitude of sparkling, icy moons in our Solar System are primarily in orbit around the four giant gaseous planets, Here, in this strange, frigid and dimly-lit realm, far from our Star's melting fires and brilliant light, these tiny frozen moons do their fabulous, lovely dance around their quartet of parent-planets. The giant, gaseous worlds that inhabit our Solar System's outer suburbs--Jupiter, Saturn, Uranus, and Neptune--are blanketed by heavy atmospheres of gas, and are accompanied, in their travels around our Star, by their orbiting retinue of many moons and sparkling, icy moonlets.
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Alas, this is not the case with Phobos and Deimos. Phobos, the larger of the duo of little Martian moons, at 22 kilometers in diameter, is lazily tumbling towards Mars and will approach the Roche limit in about 20 million years. At this tragic point, it will shatter into fragments that will ultimately form a spectacular ring around its planet. Only Deimos will remain--bereft of its companion. Deimos is the smaller moon of the pair, and circles its parent-planet further out. This last remaining little moon will be a lonely object lingering in the Martian sky at this sad point--but it was not always thus. The new 2016 study suggests that Mars once possessed a very complex system of many moons.
The current study's Franco-Belgian-Japanese collaboration looks forward to this mission. JAXA plans to enlist them to conduct tests on the Martian samples when they are returned to Earth. The samples will help the scientists determine whether Phobos is indeed made up of a mixture of Martian mantle and debris left in the wake of the tragic crash of the doomed, vanished protoplanet--as suggested by their supercomputer simulations.
Planetary scientists usually calculate the Moon's age by using the radioactive decay of elements like uranium, explained Dr. John Chambers in the April 2, 2014 National Geographic News. Dr. Chambers is a planetary scientist at the Carnegie Institution for Science in Washington, D.C. By studying an element with a recognized decay rate, and knowing its concentration in Moon rocks or the Earth's surface, scientists are able to calculate back in time to when the material first formed. However, there are numerous and varying radioactive materials that can provide differing timelines, added Dr. Chambers, who was not involved in the study.