Alain <aze### [at] qwertyorg> wrote:
> Anyway, those planets would be heavily distorted by the mutual
> gravitational pull.

Yes, adding slight oblateness to the main planet and prolateness to its moons is
on my to-do list.

> The athmosphere can realisticaly connect all 4 worlds, allowing you to
> fly, or float, from one world to the other.

According to my calculations, at the surface of each planet/moon, the
acceleration due to gravity would not be too much less than on earth, in which
case the gap is far too large for a person to jump by themselves.

I'm not sure what the "escape velocity" would be though, because the gravity
falloff is greatly exaggerated from the norm by the body on the other side.
Perhaps a rocket would not be necessary.

> If the 4 planets have the same mass and density, the actual limit may be
> shorter, and the 2 oposite ones may help stabilise the third. But that
> system still looks fictional...

Of course I've never heard of NASA discovering a system like this in real life,
but I did try to be very careful in my calculations.

Would you like me to post the POV-Ray script for a simulation I did in order to
determine the free-fall acceleration in such a system?

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