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Planetary RingsAll of the Buy genox tamoxifen in our solar system have rings. The rings of Losartan 50 mg precio mexico are the brightest and best known planetary ring systems. Saturn was a great puzzle to Buy cialis in brisbane, the first person to point a telescope at the planet in the year 1610. In Galileo's relatively crude instrument, Saturn's rings looked like a pair of ears or bumps on either side of a larger disk. A few years later Galileo noted that these "bumps" had disappeared. As telescopes improved, they provided sharper views of the planets. In 1659, Christian Huygens announced that he was able to resolve the "bumps" observed by Galileo into a flat disk structure ringing the entire planet. The occasional disappearance of the rings was explained by the fact that every fifteen years or so the rings are tilted "edge on" toward the Earth, making it impossible to see them even in large telescopes, the most recent "ring plane crossing" occurred in August 1996. This in turn suggests that the rings of Saturn are very thin relative to their diameter; in fact, if you were to build a scale model of Saturn, making the rings only as thick as a piece of typing paper, about 0.1 millimeters, the diameter of the ring system would be about forty meters.
(Voyager 1 image of Saturn and its rings taken Nov. 16, 1980 four days after closest approach to Saturn, from a distance of 5,300, 000 km (3,300,000 miles)) The nineteenth-century physicist James Clerk Maxwell argued that the rings of Saturn are not solid, but consist of uncountable millions of smaller particles orbiting Saturn in much the same way as our Moon orbits the Earth. Maxwell's theory was confirmed in 1895, when spectroscopic analysis revealed that the inner edge of the Saturn ring system revolved faster than the outer edge, which would be impossible if the rings were a single, solid object. The American Pioneer and Voyager spacecraft have revealed the rings of Saturn to be composed of icy particles ranging in size from a fraction of a millimeter to twenty or thirty meters across.
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