18. THE REASON FOR EXISTENCE OF RINGS AT THE GIANT
PLANETS
At the equator of any planet
of the solar system the Force of Attraction (gravity) is less compared with
other areas, such as poles. This is due to a stronger "warming up" of
the equator. As a result, individual molecules and chemical elements of the
atmosphere are not so hard attracted by solid phase of the planet in the
equatorial region. The value of atmospheric pressure is reduced closer to the
equator. Layer of the atmosphere above the equator is thicker. But also it is
thinner as compared with the poles.
Chemical elements and
molecules of the atmosphere, located in the uppermost layers of the atmosphere
are distanced on such large distance from the center of the planet that they
cease to reach the necessary amount of thermal radiation from the planet. And
at the same time the giant planets are very distant from the Sun and therefore
the atmosphere gets very little sunlight. As a result, the aggregate state of
the atmospheric gases becomes solid, and they turn into ice particles of
various sizes, which form rings.
In general, the very reason
for the existence of such phenomena as the "ring" is a difference in mass
of chemical elements forming compounds of the atmosphere. The heavier chemical
elements that make up the gas molecules, the closer to the surface of the solid
phase of the planet such icy chip will be located in the rings. The easier chemical
elements - the further away from the planet it is, in the outer regions of the
rings.
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