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Published on Apr 26, 2008
Ever wondered why & how the planets revolve around the Sun and why do some planets revolve faster than others? Check this amazing video taken at the Lowell Observatory in Flagstaff, Arizona. This is what the actual description said - "Massive objects like the Sun have a gravitational field. The larger the object, and the closer you are to it, the stronger its gravity. This display simulates the motion of the planets in a gravitational field. Imagine the Sun lies in the hole at the center. The coin you drop is an idealized orbiting planet, and the steepness of the well represents the increasing gravitational pull of the Sun as you get closer to it. Watch the speed of the coin as it gets closer to the Sun. Planets close to the Sun, like Mercury, must travel rapidly to avoid spiraling into the Sun. On the other hand, planets farther away, like Pluto, orbit where the Sun's gravitational field is weaker and move more slowly.
For some more photos from the Lowell Observatory please keep on clicking the next photo button after clicking on the below Picasa link -