Phobos Doomed Moon of Mars

Phobos Doomed Moon of Mars



This moon is doomed. Mars,the red planet named for the Roman god of war, has two tiny moons Phobos an Deimos, whose names are derived from the Greek for Fear and Panic.Thes Martianmoons may well be capture asteroidsoriginating in the main asteroid belt between Marsand Jupiter or perhaps from even moredistant reaches of th Solar System.In this 197 Viking 1 orbiter image,the largest moon, Phobos, is indeed seen to be aheavily cratered asteroid-like object.About 17 miles across, Phobos really zips through the Martian sky.Actually rising above Mars' western horizon and setting in the east,it completes an orbit in less than 8 hours.But Phobos orbits so close to Mars,(about 5,800 kilometers above the surface compared to 400,000 kilometers for our Moon) that gravitational tidal forces are dragging it down.In 100 million years or so it will likely crash into the surface or be shattered by stress caused by th relentlesstidal forces, the debris forming a ring around Mars.