Re: Earth on Edge

[Alberto Monteiro]

Darryl Shannon wrote:
>
> Alberto, help me out here!
>
I feel very tempted to just say "Amen". But I will just find
one nit to pick:

>Orbits are always
>parabolic, hyperbolic, or elliptical (with circular being an elliptical
>orbit with zero eccentricity). 
>
This is valid for the two-body problem [two bodies orbiting each
other, only subject to their mutual gravity]; in the real case, however,
there are other forces [non-gravitational, oblateness, other bodies]
that make the "classical" two-body orbit an approximation.

Alberto Monteiro