\(formerly\)" dlzc1.cox@net wrote in message news:k0J3b.27882$Qy4.26747@fed1read05...
Dear Donald G. Shead:

"Donald G. Shead" wrote in message
...

An orbit is the balance between two compensating motions: Impetus, or
momentum, and centripetal free fall. That is, the earth is continually
falling toward the sun, but its impetus keeps it moving in an ellipse.
When
these two motions are at a sufficiently oblique angle to each other a
stable
orbit results.

Better still. An orbit is the line of motion of a mass that has no force
applied to it. It is carrying a portion of the system's angular momentum.
If you release the apple, it follows an elliptical orbit, until the dirt
catches it.

No mysterious force required.

David A. Smith
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let me expand the issue:
there is a difference between orbits in macrocosm
in which a lot of particles take place and .....
(and that makes the attraction force more or less isotropic
microcosm
in which fery few or even single particls- are the actors.
in the second case, the attraction force is not isotropic
my explanation to that is ( as a result of the above)
that the single particles force, is unisotropic ie
directed only to one direction.
what do you think about it ?
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all the best
Y.porat
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